Constricting Kraken

Whenever Constricting Kraken deals combat
damage to a creature, you may tap that creature.
You may have up to 8 creatures tapped this way.
Creatures tapped this way don't untap during
their controller's untap step as long as you
control Constricting Kraken. At the beginning of
your upkeep, put a -1/-1 counter on each of those creatures.
"It squeezed them until they were dead, killing me crewmates one by one..."
-Survivor of a kraken attack