Gishath, Sun's Avatar [Ixalan Prerelease Promos] Magic Player Rewards 2010 or its effect

or its effect

If this card destroys an opponent's monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to its ATK in the Graveyard

by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")

•Target 1 card in your opponent's Graveyard

Gishath, Sun's Avatar [Ixalan Prerelease Promos] Magic Player Rewards 2010 or its effectSet: Ixalan Prerelease Promos Type: Legendary Creature Dinosaur Avatar Rarity: Mythic Cost: {5}{R}{G}{W} Vigilance, trample, haste Whenever Gishath, Sun's Avatar deals combat damage to a player, reveal that many cards from the top of your library. Put any number of Dinosaur creature cards from among them onto the battlefield and the rest on the bottom of your library in a random order.