aetherdrift mtg commander deck Avishkar Living Energy (Commander) 100+ Box for Magic: The Gathering constructed decks Aetherdrift Commander Deck Reveal -

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While it does take a little bit of a mana commitment and has plenty of ways of being interrupted, both options let you just take the biggest thing you have and stick it on the battlefield

Vodalian Hexcatcher While there arent too many merfolk in Standard right now, Vodalian Hexcatcher is a hell of a first start

It can make an interesting Commander instead of a companion in a graveyard recursion deck, but unless you're deliberately looking to water down your deck's power, you're probably better off using Meren of Clan Nel Toth or Muldrotha, the Gravetide instead

It's a Survival of the Fittest on legs, that taps to use its ability

We also have a colorless-creatures-matter strategy