Training Grounds [Rise of the Eldrazi] Arena League 2000 Set: Rise of the Eldrazi

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

but they're easy to catch

"Dear Magic R&D

Set: Amonkhet Invocations Type: Creature — Human Advisor Rarity: Mythic Cost: {2}{W} Sacrifice Loyal Retainers: Return target legendary creature card from your graveyard to the battlefield

Training Grounds [Rise of the Eldrazi] Arena League 2000 Set: Rise of the EldraziSet: 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.