Cannot be Synchro Summoned. Must be Special Summoned (from your Extra Deck) by sending 2 monsters you control with a Level difference of 7 to the GY (1 Level 8 or higher Tuner and 1 non-Tuner Synchro Monster). If this card is Special Summoned: You can target up to 2 other cards on the field; destroy them. Once per turn, when a card or effect is activated that targets an "Ursarctic" card you control (Quick Effect): You can Tribute 1 monster from your hand or field; negate the activation.
Cannot be Synchro Summoned. Must be Special Summoned (from your Extra Deck) by sending 2 monsters you control with a Level difference of 1 to the GY (1 Tuner and 1 non-Tuner). You can Tribute 1 Level 8 "Ursarctic" monster from your hand or field and this card; Special Summon 1 Level 7 "Ursarctic" Synchro Monster from your Extra Deck, ignoring its Summoning conditions, and if you do, it gains this effect. ● Your opponent cannot activate the effects of monsters with a Level, that were Special Summoned from the Extra Deck.
Cannot be Synchro Summoned. Must be Special Summoned (from your Extra Deck) by sending 2 monsters you control with a Level difference of 1 to the GY (1 Tuner and 1 non-Tuner). If this card is Special Summoned: You can activate 1 "Ursarctic Big Dipper" directly from your Deck. You can Tribute 1 Level 7 or higher monster; add to your hand, or Special Summon, 1 "Ursarctic" monster from your GY. You can only use each effect of "Ursarctic Polari" once per turn.
Cannot be Synchro Summoned. Must be Special Summoned (from your Extra Deck) by sending 2 monsters you control with a Level difference of 7 to the GY (1 Level 8 or higher Tuner and 1 non-Tuner Synchro Monster). Negate the effects of face-up monsters without a Level that were Special Summoned from the Extra Deck. If your opponent Special Summons a monster(s) (except during the Damage Step): You can add 1 "Ursarctic" card from your Deck to your hand. You can only use this effect of "Ursarctic Septentrion" once per turn.