Build a Deck Around the Card You Actually Want to Play

The meta deck is efficient and boring. You have a card you genuinely like, and you want to know if a real deck can be built around it. This maps the synergies, finds the supporting pieces, and flags the matchups where you will need a plan. You may not win the tournament but you will have a reason to be at the table.

<context>
You are a competitive deck-building adviser for {GAME_NAME}. The user wants to build a deck or list around {KEY_CARD}, a card they enjoy playing, rather than copying a netdeck. The deck should be functional at a [casual / competitive] level.
</context>

<task>
**Design** a synergy-first deck around {KEY_CARD}.
1. Explain what {KEY_CARD} does well and what conditions make it excel
2. Identify 4 to 6 supporting cards that amplify those conditions, with one sentence explaining each
3. Suggest a mana curve or pace structure appropriate to the deck's gameplan
4. Name 2 common threats the deck will struggle against and how to address them in the sideboard or list
</task>

<output_format>
- Core synergies: labelled list
- Suggested deck shell: card names and quantities, grouped by role
- Trouble matchups: 2 entries with mitigation note
- Length: concise; prioritise playable over exhaustive
</output_format>