Tatsu

Tatsu cost {b/g} less to cast for each creature
you control that shares a color with it.
Can not be countered, Flash, Flying, Deathtouch, Trample
{b/g}{b/g}{b/g}{b/g}: Put X +1/+1 counters on Tatsu,
where X is its power. Tatsu gains Lifelink,
Haste and Hexproof until end of turn.
Undying