Ziatora's Proving Ground [Streets of New Capenna] Vampire Warlock it also gains the following

it also gains the following ability until end of turn

Set: Commander Masters Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {5}{C} Colorless spells you cast from your hand with mana value 7 or greater have “Cascade

000 Type: Creature — Custodes Warrior Rarity: Rare Cost: {3}{W} Flash

then draws cards equal to the greatest number of cards a player discarded this way

As Murmuring Bosk enters the battlefield

Ziatora's Proving Ground [Streets of New Capenna] Vampire Warlock it also gains the followingSet: Streets of New Capenna Type: Land Swamp Mountain Forest Rarity: Rare ({T}: Add {B}, {R}, or {G}.) Ziatora's Proving Ground enters the battlefield tapped. Cycling {3} ({3}, Discard this card: Draw a card.) Restless Riveteers can always find a sparring partner in the sprawling Treza warehouse.