Rennala, Carian Queen

Hexproof
Whenever a creature you control leaves the battlefield, you may pay {u}{u}. If you do, create
a token copy of that creature.
{6}{u}, Sacrifice Rennala: Create a token copy of
each creature you control. They gain Haste until
end of turn. Sacrifice each token created this way
at the beginning of the next end step.