If you're against an aggro deck you probably want to discard some counterspells for cards that stabilize you, like Lightning Helix or Day of Judgment
It also has 3000 defense, so it can be used as a wall
Revitalizing Repast/ Old-Growth Grove Chances are you'll be able to play Old-Growth Grove before you'll want to play the instant side, sometimes it's the correct play
With so many cards using Ash Blossom, Nibiru, Droll, and other menacing hand traps, Crossout Designator can give you a little extra protection in decks that can fit it
Unlike the modal double-faced cards found in some recent sets, the back faces of transforming double-faced cards don't have a mana cost and can't be cast (although the disturb ability in this set carves out an exception)
Its also a chance to pull from packs with the hopes of getting a card with gorgeous art