Energy has been revisited several times since, including a stunning run that got another card banned, this time in Modern (Amped Raptor)
(2020-08-07) If a melded permanent or a merged permanent is exiled by Duplicant's triggered ability, that ability's controller chooses the relative timestamp of the exiled cards
Enchantment - Saga Bleeding Effect At the beginning of combat on your turn, creatures you control gain flying until end of turn if a creature card in your graveyard has flying
The "legend rule" is the rule that states that if a player controls two or more legendary permanents with the same name, that player chooses one of them, and the rest are put into their owners' graveyards
I traded mine away a while ago for a whole boatload of good Commander cards, but I included it in the list because I forgot I traded it
Those decks are rather inconsistent and vulnerable to disruption, though