Kar, Greenblade Dominator

Haste, Double strike, Reach, Vigilance
When Kar, Greenblade dominator enters the battlefield you gain three life. When Kar, Greenblade dominator enters the battlefield Kar, Greenblade dominator gets a +1/+1 for each green creature you control. During your turn you may tap X creatures you control, you get X colorless mana in your mana pool until end of turn.