Infinite Ursa, Endless Warrior

indestructible
Whenever Infinite Ursa, Endless Warrior enters
the battlefield, create a 3/3 The Ursa Corps token
with "If Infinite Ursa, Endless Warrior is not on
the field at the end of your turn, sacrifice this
creature".
Whenever Infinite Ursa, Endless Warrior attacks,
draw a card for each attacking The Ursa Corps
token you control.
At the end of your turn, create a 3/3 The Ursa
Corps token with "If Infinite Ursa, Endless
Warrior is not on the field at the end of your
turn, sacrifice