terror of cliff's

terror of cliff's enters the battlefield
with x +1/+1 counters on it and a chose
of trample and mence or trample and flying
{x}{t}sacrifice target creature with converted mana
cost x put x +1/+1 counters on terror of cliff's
sacrifice terror of cliff's all creatures
you control get +x/+x trample and haste
where x is terror of cliff's power