Kurama

Reach, trample, haste
{r}{b}: deal 6 damage to target player or
planeswalker.
If you control 5 or more energy,
Kurama becomes an aura enchantment with
"Enchant creature
Enchanted creature gains +10/+10, Reach,
trample, haste
and '{r}{b}: deal 6 damage to target
player or planeswalker.'