Riftbound Rune: Chaos Rune.
Riftbound Spell: Rally the Troops. [Action] (Play on your turn or in showdowns.) When a friendly unit is played this turn, buff it. (If it doesn't have a buff, it gets a +1 [S] buff.) Draw 1.
Riftbound Unit: Stalking Wolf. [Ambush] (You may play me as a [Reaction] to a battlefield where you have units.) As an additional cost to play me, kill a Bird, Cat, Dog, or Poro you control. You may play me to its battlefield (even if you don't have other units there).
Riftbound Battlefield: Threshold of the Gray. When combat starts here, the attacker and defender each [Add] [1].