Tartar, The Grumpy

When Tartar, The Grumpy enters the battlefield, return four target creatures to their owner's hand.
Tartar, The Grumpy's power is equal to half the number of Plains and Swamps you control.
Whenever this creature attacks, target attacking creature doubles its power until end of turn.
{2}{w/b}: Creatures you control get +2/+2 until end
of turn.