The original Magic the Gathering version of Oko gives him the ability to turn an opponent's creature into an Elk. While this would have made him much too powerful in a game with only three lanes of creatures, the most powerful aspect of Oko's abilities is doubtless, remains: he has a big headstart in blocking all three lanes of the opponent's board with . It requires three uses of Reality Swap, or a combination of that with cards like {{Card URL|Turn to Frog}}, Sleep with the Fishes or {{Card URL|Imprisoned in the Moon}}. However, although the AI is still incapable, as of October 2022, of replacing a creature with a fourth one, it can sometimes deal with lane blocking in other ways.