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While you'd normally want to, you can keep flipping as long as you keep winning if winning four flips could potentially win you the game thanks to something like Chance Encounter

(Choose any number of permanents and/or players, then give each another counter of each kind already there.) When this creature dies, proliferate

It also comes with the Evasive keyword - making it harder to challenge - and the power to quest for two lore to help you to victory

Table of Contents show What Are ETB Creatures in MTG

Of course, this can be turned into an upside with a death trigger, but its still a definite cost, which is a lot for a one-off effect