2 cards where the name includes “equilibrium”

Equilibrium (Seventh Edition #71)

Equilibrium {1}{U}{U}

Enchantment

Whenever you cast a creature spell, you may pay {1}. If you do, return target creature to its owner’s hand.

Seek balance in all things—as long as the scales are weighted in your favor.
—Vodalian saying

Illustrated by Don Hazeltine

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny
Land Equilibrium (Masters Edition III #40)

Land Equilibrium {2}{U}{U}

Enchantment

If an opponent who controls at least as many lands as you do would put a land onto the battlefield, that player instead puts that land onto the battlefield then sacrifices a land.

Illustrated by Jesper Myrfors

Part of the Reserved List

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny

The arc of my blade has carved a path of light to the end of these results.