Tilonalli's Summoner

RIX Rivals of Ixalan

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Whenever this creature attacks, you may pay {X}{R}. If you do, create X 1/1 red Elemental creature tokens that are tapped and attacking. At the beginning of the next end step, exile those tokens unless you have the city's blessing.