All you need is Selvala, Heart of the Wilds, Freed from the Real, and a creature with at least three power
Perhaps you want a deck full of rare damage-dealing cards or more common but shielded cards
These are: Innistrad-Avacyn Restored Intangible Virtue Lingering Souls Mirrodin Aether Vial Ancient Den Arcbound Ravager Darksteel Citadel Disciple of the Vault Great Furnace Seat of the Synod Tree of Tales Vault of Whispers Skullclamp Masques Lin Sivvi, Defiant Hero Rishadan Port Urza Gaea's Cradle Memory Jar Serra's Sanctum Time Spiral Tolarian Academy Voltaic Key Windfall Tempest Cursed Scroll Mirage Squandered Resources Ice Age Amulet of Quoz Thawing Glaciers Zuran Orb Magic: The Gathering Pauper ban list The list of legal cards in Pauper includes cards that are of Common rarity
Underworld Breach While Thassa's Oracle isnt legal in Historic, its partner in crime, Underworld Breach is
Im surprised Chandra's Regulator doesnt see more EDH play given that it operates like youre sacking a Blood token every turn
If at least one target is still legal, the ability will resolve but will have no effect on any illegal targets