Yggdrasil, the World Tree

Yggdrasil is indestructible, and cannot be
countered
{t} Add 9 mana of any color to your mana pool.
return target instant or sorcery to your hand
{u}{u}{ut} Counter target spell
{r}{r}{t} all creatures you control gain Prowess 10-
When you play a non-creature spell that creature gets +10/+10
Whenever a creature you control gains prowess
they also gain First Strike, Vigilance, and Trample