Angra, The Merger

When Angra, The Merger enters the battlefield,
you create {x} 1/1 Sliver creature tokens with
haste, and half as many 1/1 Eldrazi Scion
creature tokens with "Sacrifice this creature, add {c}."
Angra's power and toughness are each equal to
the amount of creatures you control.
Whenever Angra attacks, it gains trample.
Whenever Angra blocks, it gains protection from
that cards color.