Temeir, Canal Forger

Mountianwalk, Haste, Trample.
When Temeir, Canal Forger enters the battlefield produce X {e}.
{e}{e}: Put a +1/+1 counter on Temeir, Canal
Forger.
Temeir, Canal Forger, Must Attack a different opponent then the turn before if possible unless
you pay {e}.