Training Grounds [Rise of the Eldrazi] Arena League 2000 Set: Beta Edition Type: Sorcery

Set: Beta Edition Type: Sorcery Rarity: Uncommon Cost: {1}{G} Return target card from your graveyard to your hand

Set: Rise of the Eldrazi Type: Enchantment — Aura Rarity: Rare Cost: {2}{R}{R} Enchant creature

Set: Dominaria Prerelease Promos Type: Legendary Creature — Human Artificer Rarity: Mythic Cost: {2}{U}{R} Whenever you cast a historic spell

Sacrifice Scalding Tarn: Search your library for an Island or Mountain card

but they're easy to catch

Training Grounds [Rise of the Eldrazi] Arena League 2000 Set: Beta Edition Type: SorcerySet: Rise of the Eldrazi Type: Enchantment Rarity: Rare Cost: {U} Activated abilities of creatures you control cost up to {2} less to activate. This effect can't reduce the mana in that cost to less than one mana. Under the master's eye, skills are honed sharper and spells cut deeper.