Ftaeltemn, Crestfallen

Whenever another creature enters the battlefield, Ftaeltemn, Crestfallen gets +0/+1 until end of
turn.
When another creature leaves the battlefield, Ftaeltemn gets +1/+0 until end of turn.
Whenever Ftaeltemn attacks or blocks, target
player gains life equal to its toughness and
another target player loses life equal to its power.