mtg commander energy deck Aetherdrift Commander: Living Review and Upgrades 10 double MTGMH3 's Creative Energy Commander

This means among other things that whether a creature has summoning sickness is not determined by the moment it was turned face up, but rather when that object, whatever it was, came under the players control

It captures the nature of summons being powerful effects as they are in the game, but they can only exist temporarily

Meanwhile, you're free to fly through the air with Serra Angel, Serendib Efreet, Clockwork Avian, or Morphling

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Firstly, because they are insanely overpowered, and have been since they were created in 1993