+1: You gain 2 life.

−1: Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn.

−6: Create a white Avatar creature token. It has "This creature's power and toughness are each equal to your life total."

Vigilance

Whenever Sun Titan enters or attacks, you may return target permanent card with mana value 3 or less from your graveyard to the battlefield.