mind flayers mtg commander deck Thoughts on the Flayarrrs Precon Deck? and you may spend mana as though it were mana of any color to cast those spells. Commander Legends 2 Commander Deck:

[6] When a player discards a card, uses a card, or when a creature dies or a spell is destroyed, that card is put in a player's graveyard

I think the only places you would see this getting used now is due to the cycling and as cyclers go this is one of the weaker ones

Checking out a Modern Horizons or Masters set can be a great way to augment those more powerful decks

There were also many more Lessons in the Avatar: The Last Airbender Eternal supplemental set, where they appeared in Jumpstart booster packs

This includes the likes of Standard meta cards in Magic: The Gathering , like Kaito, Bane of Nightmares, which has Ninjutsu to return an attacking creature to the player's hand and put Kaito tapped and attacking in its place

Eventually of course all this madness had to be stopped, so when the Extended format was created they made sure to put this on the banned list