Hero card

Efflorescence

Instant

SpellUsed once: what it does depends on when you cast it

Needs: Lifegain

Gives: Counter +1/+1, Spells

Not in winning lists yet: read from the card text and the graph

Build a deck with Efflorescence as the hero

Makes it work

Titanbones, Towering Heart · Ajani Resolute · Vigorbloom Vanguard · Leonardo, Cutting Edge · Aerith Gainsborough · Minwu, White Mage · Inkshape Demonstrator · Primeval Bounty

Benefits from it

Pest Mascot · Tigra, Feline Fury

Use instead if you don't have it

Saved by the Shell · Biosynthic Burst · Inspiring Call · Warg Tactics · Archdruid's Charm · Origin of Metalbending

Cards in the meta that answer it

Countersculpt (Azorius Control) · Inevitable Defeat (4-Color Control) · No More Lies (Azorius Control) · We Say Thee Nay! (Dimir Aggro)