Sanctum of Eternity [Commander 2019] Battle Royale upping the challenge they face

upping the challenge they face while also providing them with new powers and new heroes as well

then attach this to it

create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on Hangarback Walker

Set: Commander 2013 Type: Artifact Rarity: Rare Cost: {3} No more than two creatures can attack you each combat

Set: Duel Decks: Phyrexia vs

Sanctum of Eternity [Commander 2019] Battle Royale upping the challenge they faceSet: Commander 2019 Type: Land Rarity: Rare {T}: Add {C}. {2}, {T}: Return target commander you own from the battlefield to your hand. Activate only during your turn. Come and rest here, beyond the constraints of space and time.