Hidden Arsenal 5: Steelswarm Invasion: Special Edition

1 Tuner + 1+ non-Tuner monsters
You can discard any number of cards to the GY, then target the same number of cards your opponent controls; return those cards to the hand. You can only use this effect of "Brionac, Dragon of the Ice Barrier" once per turn.

Brionac, Dragon of the Ice Barrier

1 Tuner + 1 or more non-Tuner WATER monsters
Once per turn: You can discard up to 2 cards to the Graveyard to target the same number of cards your opponent controls; destroy them.