Paroxysm

{1}{R} · Enchantment — Aura

Enchant creature At the beginning of the upkeep of enchanted creature's controller, that player reveals the top card of their library. If that card is a land card, destroy that creature. Otherwise, it gets +3/+3 until end of turn.

Motor: se resuelve a mano

Rulings (1)

The ability is not optional.
Wizards of the Coast · 2004-10-04