Fantasy Monster

It's called Fantasy Monsters. They are stored in the Warped Deck, but unlike Paradox, Class and Gravity Monsters, they lack DEF, like Link Monsters. Instead, they have an indicator (not Star, just at a loss of words) called Stamina (STM for short). You can send monsters from the field to the GY to Summon a Fantasy Monster from the Warped Deck. The more monsters it requires, the stronger the STM it gets. It cannot be destroyed by battle while it has Stamina, while if you take damage from battles involving a Fantasy Monster, it loses STM equal to the damage you took.

Example

 * Rainbow-Eyes Simorgh
 * Rainbow-Eyes Knuckle Dragon