[+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."
The power and toughness of the Avatar created by the third ability will change as your life total changes.
The vigilance granted to a creature by the second ability remains until the end of the turn even if the +1/+1 counter is removed.