best merfolk cards mtg What are good for a Commander deck? Merfolk...Er, Red Aggro - Star

As long as your devotion to red and green is less than seven, Xenagos isnt a creature

Scry 2 (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

For the low-low cost of five Creatures sacrificed and 5 mana

It's exactly what I expect from a modern flavor text

8 Elder Deep-Fiend On Second Thought, I'll Pass On The Calamari There are better Eldrazi, yes, but of the Innistrad Remastered Eldrazi, this one has legs

Binding the Old Gods While it might not be as flashy and instantly impactful as some of the other options here, Binding the Old Gods is an exceptional value pick