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Having one player create a (mostly) balanced tug-of-war is a losing move likely to cause frustration and discourage usage of your mechanic

Lets look at some more affordable one-mana enchantment options

Ozai, the Phoenix King allows you to keep mana in your pool that would otherwise empty making him kind of like a Rakdos version of the original Omnath, except he also provides some mana from Firebending to get you going

For example, in Commander, if your opposing Commander dies, you can get it back and back again, but wither can just neuter it

More often than not, Kykar, Wind's Fury Commander decks cast low-cost spells to build value and win with a powered-up Kykar or big burn spells like Banefire