The Emperor - Tav’s Watcher

The Watcher in the Water enters the
battlefield tapped with nine stun counters
on it.
Whenever you draw a card during an
opponent's turn, create a 1/1 blue Tentacle
creature token.
Whenever a Tentacle you control dies,
untap up to one target Kraken and put a
stun counter on up to one target nonland
permanent.