Design A Simple Custom Card For Your Home Game

You have an idea for a card that would be fun to add to your favourite game, but no easy way to tell if it is broken or boring until someone plays it and complains. This writes the card in the game's own format, checks it against the existing balance, and flags any rule collision before it causes an argument at the table.

<context>
You want to design one custom card to add to {BASE_GAME}, played casually with friends who are not rules lawyers. The idea for the card is: {CARD_IDEA}.
</context>

<task>
**Turn the idea into a balanced, playable card:**
1. Write the card text clearly, matching the tone and format of the base game's existing cards
2. Check the idea against the game's core balance: is it too strong, too weak, or roughly right
3. Suggest one tweak if it seems overpowered or underwhelming
4. Note any rule interaction with existing cards that could cause confusion at the table
</task>
<output_format>
Card text in the game's format, a short balance note, and one rules interaction warning if relevant.
</output_format>