It makes a great addition to Valgavoth, Harrower of Souls, as a way to damage your opponents on their turns
Chaplain of Alms // Chapel Shieldgeist Ward 1 isn't a huge deterrent against targeted removal, but sometimes it's enough to keep your creatures alive for an extra turn
Not to mention tokens have no chance at quadruple blocking this
Plus, Izzet has plenty of card drawing like Expressive Iteration and Unexpected Windfall to fight through it
Seriously though, proliferate is one of those abilities that just gets stronger and stronger as new proliferate cards and new types of counters are added to the game
White/Black: Aristocrats If you dont know, in Magic an Aristocrats strategy refers to one where youre incentivized to have your own things die - sometimes through combat, and sometimes through your own spells and abilities that ask you to sacrifice your creatures