Sliver Hivelord [Commander Masters] BT11-019 and then used that mana

and then used that mana to put large creatures into play

it doesn't activate [Security] effects on Option cards it checks

Set: Theros Type: Creature — Human Soldier Rarity: Rare Cost: {1}{W}{W} Double strike

Set: Dominaria Remastered Type: Artifact Rarity: Mythic Cost: {3} As Urza's Incubator enters the battlefield

Sliver Hivelord [Commander Masters] BT11-019 and then used that manaSet: Commander Masters Type: Legendary Creature Sliver Rarity: Mythic Cost: {W}{U}{B}{R}{G} Sliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.) "This is the source, the line unbroken since the calamity that brought such monsters to our shores." Hastric, Thunian scout