Plaxmanta

Oracle Text

Flash

When Plaxmanta enters the battlefield, creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)

When Plaxmanta enters the battlefield, sacrifice it unless G was spent to cast it.

Card Rulings

5/1/2006 If this enters the battlefield in a way other than announcing it as a spell, then the appropriate mana can’t have been paid, and you’ll have to sacrifice it.