Algroth, Beast by Night

(Transforms from Korgoth, Warrior by Day)
First strike, trample, hexproof, haste
Other Wolves and Warewolves you control gain
+3/+3, have haste and trample, and "{r}{g}:
Transform this creature."
{2}{r}{r}{g}{g}: Destroy target permanent, then
transform Algroth, Beast by Night.