The Brimstone Witch

When The Brimstone Witch enters the battlefield, create 2 4/4 Fire Elemental creature tokens with Flying, Deathtouch and Haste. Exile these tokens after 3 turns.
{1}{b}{r},{t}: Create 4 0/1 Brimstone Heart tokens with "{t}, Sacrifice this token: Gain 1 Life and add {b} to your mana pool. As long as there is a Brimstone Heart Token, the Owner and Planeswalkers the Owner controls cannot be damaged." Exile all Brimstone Heart tokens after 3 turns.