Rainbow Path

Normal Trap

When an opponent's monster declares an attack: Send 1 "Crystal Beast" card from your Spell & Trap Card Zone to the Graveyard to target the attacking monster; negate the attack, then you can add 1 "Rainbow Dragon" or "Rainbow Dark Dragon" from your Deck to your hand.

Rulings – Yugipedia

Printings:

Phantom Darkness: PTDN-EN063 (Common) - 2008-02-13
Legendary Collection 2: The Duel Academy Years Mega Pack: LCGX-EN173 (Common) - 2011-10-04
Ra Yellow Mega Pack: RYMP-EN056 (Common) - 2012-02-17
Legendary Duelists: Season 1: LDS1-EN114 (Common) - 2020-07-02

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.11