Superancient Deepsea King Coelacanth (UTR) (PTDN-EN034) - Phantom Darkness Unlimited Attack_200 you can Special Summon this

you can Special Summon this card from your hand during that Battle Phase

If this card is banished from your Graveyard: You can add 1 Ritual Monster from your Deck to your hand

This card cannot be Special Summoned except by sending 3 monsters you control to the Graveyard

and Special Summon that Monster from your Fusion Deck

Card TextWhen you have "Right Leg of the Forbidden One"

Superancient Deepsea King Coelacanth (UTR) (PTDN-EN034) - Phantom Darkness Unlimited Attack_200 you can Special Summon thisTypeFish Effect Monster AttributeWATER Level Rank7 ATK DEF2800 2200 Card TextOnce per turn, you can discard 1 card to Special Summon as many Level 4 or lower Fish Type monsters as possible from your Deck. A monster Special Summoned by this effect cannot declare an attack and its effect(s) is negated while on the field. If this card is targeted by a Spell, Trap, or Effect Monster's effect, you can Tribute 1 other Fish Type monster to negate the effect