mtg card that turns lands into creatures The Best Creature In Exploring Landfall Mechanics in Magic:

When it dies, you get to create a legendary White equipment called Icingdeath, Frost Tongue, which gives a creature +2/+0 and the ability to tap a creature whenever the equipped creature attacks

Black/Green Morbid: A bird in the graveyard is worth two in your hand

I do not personally sell cards so I cannot say for sure if this extra level of organization is worth the effort

This locks just about anything down for three turns, which is an eternity in a format like Modern

It's not quite as good as the Commander's two damage, but pumping out an endless quantity of Goblins more than makes up for it

TCGplayer is looking into this, though I dont expect that I will ever know the outcome