Orion, Master of the Wild Hunt

{g}: Regenerate another target Elf.
{2}{g}{g}{g}: Elf creatures you control get
+3/+3 and gain trample until end of turn.
The King in the Woods is irrevocably tied to the seasons. Thus does he pass willingly into his
own funeral pyre each midwinter, only to be
reborn into thunderous life on the first day of spring.