MTG Arena, Noob Generator

{x}{t}Put {x} 1/1 Noob Tokens on the Battlefield. If a player makes a mistake or misplay while controlling any Noob Tokens, Sacrifice {x} Noob Tokens, where {x} is equal to the converted casting cost of the mistake or misplay card. If the player can not Sacrifice {x} Tokens, then that player loses the game.