Yuna, Eons Caller

When Yuna, Eons Caller enters the battlefield
you get an emblem with"whenever Yuna, Eons
Caller enters the battlefield, add a counter on
the emblem and create a X/X white Bird creature
token with flying where X is the number of
counters on the emblem.
You can't have more than one Yuna's emblem."
"I will share your pain with you."
-Yuna, to Anima