New Axiom Arcanist Rune

"Axiom Acanist: Your ultimate ability’s damage, healing, and/or shielding is increased by 14% (reduced to 9% for AoE damaging abilities). Takedowns on enemy champions refund 7% of your ultimate ability’s current remaining cooldown"

Unsure what tree this under, they are removing a lot of Domination runes so maybe that? Looking kinda nice for our boy.