Brisha, Captain of the Depths

Horrors you control have Menace and gets +1/+0

Whenever Brisha attacks, sacrifice all other Pirates
you control, then mill cards equal to the number of Pirates sacrificed this way. you may put a creature card milled this way onto the battlefield tapped and attacking. if that creature was a horror, it enters
with 2 additional +1/+1 counters on it.

Whenever a Horror enters, Draw a card and gain 1 life.