grima wormtongue mtg card Grima, (4R154) If the sacrificed creature was legendary MTGNexus - Gríma Wormtongue

It's nice that you can just wait and cast the transformed side of these rather than having to protect their fragile alter ego bodies

Next comes Historic, followed by Brawl, both very close in population

Well now the answer is here, and indeed there are Eldrazi in the upcoming MTG set

When the Titan enters the battlefield or attacks, you trigger its ability to draw a card for each other creature you control that shares a creature type with the Titan

Each bending trigger (keyed to different types of spells or actions) feeds you card draw or other forms of advantage

Some cards are technically legendary rogues but cant be your commander