Fossil Researcher (110/111) [XY: Furious Fists] SWSH180 You must also offer monsters

You must also offer monsters whose total Level Stars equal 4 or more as a Tribute from the field or your hand

when this face-up card on the field is targeted by a card effect: You can Tribute 1 other Fish-Type monster

While "The Sanctuary in the Sky" is on the field and your Life Points are higher than your opponent's

Set: Soul of the Duelist Card type: Effect Monster Rarity: Ultimate Rare Attack: 3000 Defense: 1800 This card cannot be Normal Summoned or Set

or Graveyard face-up in your Spell & Trap Card Zone

Fossil Researcher (110/111) [XY: Furious Fists] SWSH180 You must also offer monstersSet: XY: Furious Fists Type: Supporter Rarity: Ultra Rare