1 WATER Tuner + 1+ non-Tuner monsters
Once per Chain, if your opponent Special Summons a monster(s) (except during the Damage Step): You can Special Summon 1 "Ice Barrier" monster from your hand, Deck, Extra Deck, or GY, then you can change 1 Attack Position monster your opponent controls to Defense Position. You can only use this effect of "Lancea, Ancestral Dragon of the Ice Mountain" twice per turn. If this face-up Synchro Summoned card in its owner's control leaves the field because of an opponent's card: You can Special Summon 1 "Ice Barrier" Synchro Monster from your Extra Deck. (This is treated as a Synchro Summon.)
![Lancea, Ancestral Dragon of the Ice Mountain [BLTR-EN005] Quarter Century Secret Rare 1st Edition](http://www.darkfoxtcg.com/cdn/shop/files/554855_3ddc4402-addc-45d9-90e2-ac8012276db0.jpg?v=1764511529)