Nickol Bolas, the Depleter

First Strike, Deathtouch, Ward —{3}
Other Dogs you control get +1 +1, and have "Whenever
you draw a card put a +1 +1 counter on target dog you control.
Whenever Nickol Bolas, the Depleter or another dog enters the battlefield, each opponent discards a card
and you draw a card.
Whenever an opponent discards a card, they may pay 2 life, if they do they draw a card and you draw a card.

{x}{x}{x}{t}: Each opponent discards X cards, loses X life,
and you gain X life and draw X cards.