Claptrap

{u}: Reveal the top card of your library, if the revealed card was a creature or artifact Claptrap gains all the revealed cards activated abilities until end of turn, if the revealed card was a instant or sorcery Claptrap gains Prowess and is unblockable until end of turn, and finally if a land or enchantment was revealed then Claptrap loses all abilities and becomes a 0/1 with Defender until end of turn.
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