Belle has plenty of Shift-worthy options and ties into several common types (Hero, Princess, and Sorcerer)
Honorable Mentions Red Its not quite double damage, but then again, its not doubling damage back to your face
Lorcana The First Chapter Booster Pack 12 In this pack, we got: Commons: Hercules True Hero, Freeze, Heihei Boat Snack, Pongo Ol' Rascal, Work Together, and Horace No-Good Scoundrel Uncommons: Aurora Regal Princess, Dr
Take Takeno's Cavalry, a 1/1 for 4 mana that can tap to shoot an attacking or blocking Spirit for a mighty one damage while swinging for one itself (unless its blocked, and then you get a 2/2 for our 4 mana investment)
Use tracking and insurance
A Realm Reborn Approach My Molten Realm Ayara, Widow of the Realm Boon of the Spirit Realm Boundless Realms Collision of Realms Constable of the Realm Depart the Realm Eclipsed Realms Fealty to the Realm Genju of the Realm Greater Realm of Preservation Hostile Realm Liliana of the Dark Realms Mirror Room // Fractured Realm Mirror Room // Fractured Realm Prison Realm Realm Razer Realm Seekers Realm of Koh Realm-Cloaked Giant Realm-Cloaked Giant Realm-Scorcher Hellkite Realmbreaker's Grasp Realmbreaker, the Invasion Tree Realms Befitting My Majesty Realms Uncharted Realmwalker Realmwright Rise of the Dark Realms Roon of the Hidden Realm Sarulf, Realm Eater Shield of the Realm Sovereign's Realm Sustainer of the Realm Sword of the Realms Teferi's Realm Touch the Spirit Realm Underrealm Lich Wrenn and Realmbreaker