mtg spellslinger commander deck Niv-Mizzet Parun EDH | Deck The Gathering You can have a spellslinger

The mechanic was never used again, and Mark Rosewater is on record as saying its a 9 on the Storm Scale

I could also see Aggro decks that want to run Freya implementing a couple of pieces of Equipment to leverage that mana ability

It unlocks a bonus when a nonland permanent left the battlefield this turn or if you cast a warp spell

The roles help reduce the card disadvantages auras normally have, as you are generally getting them as part of another spell

Now you'll love it a lot

Sure, Thassas Oracle is not the best typal support for Merfolk decks, but saying its not the best Merfolk in Commander is almost strictly wrong