Alex, Loyal Lioness

+2: Gain 2 health for each creature under your control that took damage this and/or the previous turn, put a +0/+2 counter on each
X: Gain X health and devotion for each +1/+1 marker on the field
-15: Gain X health where X is current devotion. Search library/graveyard for Alex, Unhinged Treason & put it on the BF, return this card to your hand