Treeborn Frog (UTR) [SOI-EN025] Ultimate Rare Vaccine Packs of Squighog Boyz are

Packs of Squighog Boyz are often accompanied by Bombsquigs – living weapons that demonstrate an alarming lack of self-preservation as they careen into the thick of combat before detonating with killer intent

From the gleefully-twisted mind that created Fuan no Tane

If it's a Mechanologist item card with cost 0

Inside this 200-page hardback book

Treeborn Frog (UTR) [SOI-EN025] Ultimate Rare Vaccine Packs of Squighog Boyz areSet: Shadow of Infinity Card type: Effect Monster Rarity: Ultimate Rare Attack: 100 Defense: 100 If this card is in your Graveyard during your Standby Phase and there are no Spell or Trap Cards on your side of the field, you can Special Summon this card to your side of the field. This effect cannot be activated if there is a face up "Treeborn Frog" on your side of the field.