Ursarctic Polar Star (Super Rare)

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 Special Summoned from the Extra Deck that have a Level.