Yoda

Eminence -As long as Yoda is in the command zone
or on the battlefield, at the beginning of your
precombat main phase, add {g}, {w} or {u} to your
mana pool. Spend this mana only to cast a Jedi spell.
Jedi you control have indestructible.
"Size matters not. Look at me. Judge me by my size,
do you? Hmm? And well you should not. For my ally
is the Force, and a powerful ally it is."