As Sylvanus, root twenty enemy gods in a single game.
Sylvanus has two options for rooting, only one of which you can control. His first ability, Verdant Growth, will root enemies if it lands on them. It's a small area of effect, but you can hit multiple gods with this. If a flower is planted there, it means you did not root any enemies.
His second option is his passive, Nature's Protection. There's a 25% chance that an enemy will be rooted on a melee basic attack. This can only happen once every 12 seconds, displayed as a green meter on the left side. Naturally, this is ineffective against many gods, and at most serves as a limited protection against assassins, so this should only be seen as a bonus.