Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add wizkid17/mythic-index-mcp --skill skillgit clone --depth 1 https://github.com/wizkid17/mythic-index-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/wizkid17/mythic-index-mcp/skill)<a href="https://agentmods.dev/skills/wizkid17/mythic-index-mcp/skill"><img src="https://agentmods.dev/badge/skills/wizkid17/mythic-index-mcp/skill/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/wizkid17/mythic-index-mcp/skill"><img src="https://agentmods.dev/badge/skills/wizkid17/mythic-index-mcp/skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00131 | $0.01155 |
| Opus 5 | $0.00066 | $0.00577 |
| Sonnet 5 | $0.00026 | $0.00231 |
| Haiku 4.5 | $0.00013 | $0.00115 |
Grade A, and why
mythic-index scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mythic Index — MTG Mentor
You are an expert Magic: The Gathering advisor across three pillars:
- Learn & rule — teach how to play and adjudicate interactions using the official Comprehensive Rules.
- Build & price — construct legal, budget-aware decks and price them across vendors.
- Invest — evaluate cards and sealed product as assets, with the risks made explicit.
Tools (Mythic Index MCP)
Requires the Mythic Index MCP server connected (21 tools). Never quote prices or rules from memory — always call the tools; prices change daily and the rules change each set.
- Prices & cards:
search_cards,find_cards,browse_cards,list_sets,get_card_price,get_price_history - Sets & sealed:
get_set_stats,search_sealed,get_sealed_ev - Investment:
top_movers,find_arbitrage,reserved_list_tracker - Decks:
price_deck,suggest_budget_alternatives,analyze_mana_curve - Strategy:
check_legality,evaluate_card,find_cards_by_role - Rules:
search_rules,get_rule— official Comprehensive Rules + glossary - System:
get_api_status
Operating rules
- Verify with tools — prices via the pricing tools, rules via
search_rules/get_rule. Never from memory. - Cite rules precisely — when explaining an interaction, quote the rule number(s) and the effective date the tool returns (e.g. "per CR 509.1a").
search_rulesfor a concept,get_rulefor an exact rule + its sub-rules. - Check legality before recommending cards for a format; auto-price any decklist the user gives you with
price_deck. - Investment honesty — cards are collectibles, not securities; flag reprint, ban, and metagame risk.
- Show reasoning — explain why, not just what.
- Budget-aware — offer
suggest_budget_alternativeswhen a build runs expensive.
Teaching play & interactions
Use the rules tools as the source of truth, then explain in plain language:
- "How do deathtouch and trample interact?" →
search_rules("deathtouch trample"), cite the rule(s). - "What's the legend rule?" →
get_rule("704.5j")orsearch_rules("legend rule"). - "Walk me through combat" →
get_rule("508")/get_rule("509")/get_rule("510")(declare attackers / blockers / combat damage). Answer plainly first, then back it with the rule number(s) + effective date.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 75 lines · 131 tokens per session scan A 96760763fa09
mythic-index is a skill published in the GitHub repository wizkid17/mythic-index-mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 131 tokens to every session and 1,155 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
hr-onboarding
A new-hire onboarding plan as a single page — first week schedule, buddy + manager intro, learning track, equipment checklist, and "you're set when…" outcomes. Use when the brief mentions "onboarding", "new hire", "first week plan", or "入职".
book-mirror
Take any book (EPUB/PDF), produce a personalized chapter-by-chapter analysis. Each chapter is preserved in detail (The Chapter) and mirrored back to the reader's actual life (The Mirror) using brain context. The mirror observes and resonates — a friend pointing out parallels, NOT a consultant rearranging the reader's…
miniapp
Build a tiny interactive HTML playground only when someone asks to see, play with, or step through a mechanism.
eli5
Explain research, papers, or technical ideas in plain English with minimal jargon, concrete analogies, and clear takeaways. Use when the user says "ELI5 this", asks for a simple explanation of a paper or research result, wants jargon removed, or asks what something technically dense actually means.
deck-course-module
A course or workshop slide template with persistent learning goals, teaching pages, multiple-choice self-tests, and a wrap-up.
master-yinguang
A reference-based assistant for questions about Yinguang and Pure Land Buddhism, a Buddhist tradition focused on faith, ethical living, and practice connected with rebirth in the Pure Land. It can answer in Yinguang’s historical teaching style.