Kyla, Merfolk's Investigator

Whenever Kyla, Merfolk's Investigator attacks,
creatures you control get +X/+X until end
of turn where X is the number of energy counters
you have.
At the beginning of your end step, you get {e}.
{t}, Pay {e}{e}{e}{e}{e}{e}{e}{e}: Kyla gets +10/+10
until end of turn.