Hive Tyrant

Carapace (This creature has protection from spells
and permanents with converted mana cost equal to or
less than its own.)
{1}, Sacrifice a Sliver: Choose one—
• Counter target ability that targets a Sliver you control.
• You gain 3 life.
• Put a +1/+1 counter on Hive Tyrant.
Hive Tyrant's power is equal to the total power
of other Slivers you control.