wizards of the coast mtg card database Core Set 2020 Card Advantage—Two-for-Ones | MAGIC: THE

Thats who it reminds me of

Tocasia, Dig Site Mentor Were definitely in niche build-around commander territory, with Tocasia, Dig Site Mentor being a highly specific graveyard/artifact commander

Doubling the effects of Knight of the White Orchid, Mesa Enchantress, or even Brago, King Eternal the possibilities are endless

Since you can activate Aetherflux Reservoirs ability at instant speed, players are hesitant to try and remove it or threaten you in any significant way once you have enough life to take one of them out with it

It works offline, and changes are consolidated when you reconnect

You do want access to a lot of mana and casting discounts