Apex predator

Haste
When Apex predator enters the battlefield, you
may pay X. For every X paid, this creature
gains a +1/+1 counter. For every +1/+1 counter gained this way, you may choose 1 creature to 'mimic' Apex predator, the mimiced creatures gain haste.
(Mimic forces a creature to copy the moves of another creature, this does not count for abilities.)