Cheyenne, Elf of the Lotus

Haste, Trample, Undying, Bloodthirst 2
Landfall — create a 1/1 green elf named lotus
elf with Bloodthirst 1, haste, and {t}: add one
mana of any color
{3}{r}{g},{t}: return target elf in your graveyard
to the battlefield with haste, then if you control
ten elves transform Cheyenne, Elf of the Lotus,
into Cheyenne Summer
"A forest elf who uses fire, such a rare sight"