Even though the player who was dealt damage chooses the target for Bladegriff Prototype's ability, you are the controller of the ability
Mountain Rarity: Common TYPE: Basic Land SUBTYPE: Mountain CMC: 0 Mana cost: USD: $0.27 EUR: 0.30 TIX: 0.03 EDHREC RANK: - ( : Add .) Mountain Rarity: Common TYPE: Basic Land SUBTYPE: Mountain CMC: 0 Mana cost: USD: $0.21 EUR: 0.09 TIX: 0.03 EDHREC RANK: - ( : Add .) Mountain Rarity: Common TYPE: Basic Land SUBTYPE: Mountain CMC: 0 Mana cost: USD: $0.16 EUR: 0.13 TIX: 0.03 EDHREC RANK: - ( : Add .) Mountain Rarity: Common TYPE: Basic Land SUBTYPE: Mountain CMC: 0 Mana cost: USD: $0.27 EUR: 0.28 TIX: 0.03 EDHREC RANK: - ( : Add .) Muldrotha, the Gravetide Rarity: Mythic Rare TYPE: Legendary Creature SUBTYPE: Elemental Avatar CMC: 6 Mana cost: USD: $0.86 EUR: 1.14 TIX: 0.02 EDHREC RANK: 1107 (6/6) During each of your turns, you may play a land and cast a permanent spell of each permanent type from your graveyard

Right now, we are currently in the fifth year since Jace, the Mind Sculptor and Stoneforge Mystic got banned, which means the next year or two could be the time where a mistake happens (or perhaps Wizards lets its guard down and starts forgetting past lessons)
For long-time fans of the massive TTRPG, some of the Planeswalkers and creatures will be familiar, with faces like Mordenkainen, Zariel of Avernus, and the floating Beholder enemies all colliding in deck-building battles
[3] The cube can be any size you want so long as its at least 360 cards