Riftbound Spell: Fading Memories. Give a unit at a battlefield or a gear [Temporary]. (Kill it at the start of its controller's Beginning Phase, before scoring.)
Riftbound Unit: Fiora, Worthy. When a unit you control becomes [Mighty], you may pay [C] to ready it. (A unit is Mighty while it has 5+ [S].)
Riftbound Spell: The Ruination. Kill all units.
Riftbound Unit: Kha'Zix, Evolving Hunter. [Hunt] When I attack, you may spend 3 XP to deal damage equal to my Might to an enemy unit here.