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The creatures you do play should in some way help prolong the game while providing some sort of advantage

Golgari Thug

Flickerwisp There are quite a few iconic and powerful creatures with blink effects

But it's still a relevant card in Legacy, Vintage, and Commander

Removing a counter from one of your permanents can sometimes even be beneficial, like clearing a stun counter or -1/-1 counter

Cards like Waterbender's Restoration, Extravagant Replication and Thassa, Deep-Dwelling repeatedly flickering your Aether Channeler and Riftwing Cloudskate gives you an incredible advantage because your opponents have to recast the same creature over and over (this is trickier in our era of powerful enters abilities, but still works)