Keithos, The Three

Trample, Of The Three
This card gets +3/+3 for every Of The Three
card on the battlefield
Whenever an elemental comes into the
battlefield, create 3/3 green elemental tokens
equal to its mana value
Whenever a Vampire leaves the battlefield, all elementals get +x/+x equal to its mana cost
until end of turn
Elementals cost {1} less to cast
Vampires cost {1} more to cast