Before I get too far ahead of myself, I should go over the basic discussion of Okos play pattern that answers the question, Why is Oko so good? The answer largely comes down to Okos incredibly high loyalty, but theres a little more to it
However, to say the added cost is worth the upgrade in efficacy is a severe understatement
Specifically, whenever an effect asks you to draw a card and your library is empty, you lose the next time a player would receive priority (which, in practice, pretty much means on the spot , regardless of what's in play or on the stack)
It is a token-focused mechanic and allows you to make a copy of a creature token that you control
As a highly variable rules-based TCG, every card features a relatively uniform structure
Rarity : Common/Rare/Mythic Rare Cost : 2U Colour Identity : Blue Usage : Provides ongoing card draw and incentivizes opponents to play around its ability