One card represents our Multiverse and the other represents the Echoverse
(2021-03-19) Switching a creature's power and toughness twice (or any even number of times) effectively returns the creature to the power and toughness it had before any switches
Each sheet comes as a high-resolution PDF that prints cleanly on standard paperideal for quick classroom projects, rainy-day crafts, or quiet time at home
Most notably, swap out the counterspells for some less efficient ones Rewind, Dissipate, Forceful Denial, Faerie Trickery and such still do the job, but not quite as efficiently as the likes of Mana Drain, Force of Negation and Swan Song
This was an additional way to show off the world of Ikoria, which ended up working out in some cool ways I'll get into later
-3: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control