Aang, the Last Airbender

Airbending Master- When Aang attacks,put a flying counter on him. If Aang becomes blocked, you may
untap Aang and remove him from combat.

Spirit Bridge- Creatures in exile you control can
be cast by paying {2} and exiling Aang in addition
to their other costs.

Avatar State- You may cast Aang from exile by
paying {2}{w}{u}{r}{g}, if you do he enters with a hexproof, trample, and first strike counter.