Portcullis [Stronghold] Amonkhet Promos Set: Cosmo Blazer Card type:

Set: Cosmo Blazer Card type: Continuous Spell Rarity: Common Attack: 0 Defense: 0 When this card is activated: You can add 1 Level 4 or lower Beast-Warrior-Type monster from your Deck to your hand

We just need to look in the right places

they discard 1 card

that monster you control gains 2000 ATK and DEF during that damage calculation only

Portcullis [Stronghold] Amonkhet Promos Set: Cosmo Blazer Card type:Set: Stronghold Type: Artifact Rarity: Rare Cost: {4} Whenever a creature enters the battlefield, if there are two or more other creatures on the battlefield, exile that creature. Return that card to the battlefield under its owner's control when Portcullis leaves the battlefield.