Raptoor the Immortal Wrath

Vigilance, Trample, Reach, First Strike
when this card enters the battlefield put X +1/+1
counters on it, when this card enters the
battlefield chose a color, Raptoor the Immortal
Wrath has protection from chosen color, this
creature has abilities of other hydras you control,
other hydras you control cost X less to cast and
get X +1/+1 counters when they enter the
battlefield, whenever one or more counters is put
on a creature you control double the number of
counter on it.