Brionac, Dragon of the Ice Barrier
Level 6 WATER/Sea Serpent Synchro Effect2300 ATK / 1400 DEF
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.
Dewloren, Tiger King of the Ice Barrier
Level 6 WATER/Beast Synchro Effect2000 ATK / 1400 DEF
1 Tuner + 1 or more non-Tuner WATER monsters
Once per turn, you can return any number of face-up cards you control to the owner's hand. For each card returned to the owner's hand by this effect, this card gains 500 ATK until the End Phase.
Gungnir, Dragon of the Ice Barrier
Level 7 WATER/Dragon Synchro Effect2500 ATK / 1700 DEF
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.
Trishula, Dragon of the Ice Barrier 13
Level 9 WATER/Dragon Synchro Effect2700 ATK / 2000 DEF
1 Tuner + 2+ non-Tuner monsters
When this card is Synchro Summoned: You can banish up to 1 card each from your opponent's hand, field, and GY. (The card in the hand is chosen at random.)
Trishula, Zero Dragon of the Ice Barrier
Level 11 WATER/Dragon Synchro Effect2700 ATK / 2000 DEF
1 Tuner + 2+ non-Tuner monsters
When this card is Synchro Summoned: You can banish up to 3 cards your opponent controls. If this Synchro Summoned card in its owner's control is destroyed by an opponent's card: You can Special Summon 1 "Trishula, Dragon of the Ice Barrier" from your Extra Deck or GY, its ATK becomes 3300, then halve the ATK of any face-up monsters your opponent currently controls, also negate their effects. You can only use this effect of "Trishula, Zero Dragon of the Ice Barrier" once per turn.