Buster Sword

Equipped creature gets +3/+2. Whenever equipped creature deals combat damage to a player, draw a card, then you may cast a spell from your hand with mana value less than or equal to that damage without paying its mana cost. Equip {2}

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o88mw57cppb1hrinrkk0q.