Tetravus [Antiquities] BW35 you can activate 1 of

you can activate 1 of the following effects: *Send 1 monster you control to the Graveyard to return all monsters your opponent controls to the Deck

Set: EX: Dragon Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

Set: Base Set Unlimited Type: Grass Rarity: Holo Rare Retreat cost: Colorless

and a tail to split open skulls

target player may put Regna into their hand from their library

Tetravus [Antiquities] BW35 you can activate 1 ofSet: Antiquities Type: Artifact Creature Construct Rarity: Rare Cost: {6} Flying Tetravus enters the battlefield with three +1 +1 counters on it. At the beginning of your upkeep, you may remove any number of +1 +1 counters from Tetravus. If you do, create that many 1 1 colorless Tetravite artifact creature tokens. They each have flying and "This creature can't be enchanted." At the beginning of your upkeep, you may exile any number of tokens created