Neskir, Deep Water King

Merfolk and Pirate creatures you control have,
"Plunder - Whenever this creature attacks, draw
a card unless defending player taps an untapped
permanent they control. It doesn't untap during
its controller's next untap step."
Raid - At the beginning of the end step,
if you attacked with a creature this turn, untap
X target permanents, where X is the number
of tapped creatures you control.