Noivern (101/131) [Sun & Moon: Forbidden Light] SM187 and it will remain revealed

and it will remain revealed until the end of this turn

Set: Duel Terminal 1 Card type: Synchro/Effect Monster Rarity: Rare Attack: 2100 Defense: 400 1 Tuner + 1 or more non-Tuner monsters During battle between this card and a Defense Position monster whose DEF is lower than the ATK of this card

Set: Dark Beginning 2 Card type: Normal Spell Rarity: Common Both players cannot destroy Set Spell and/or Trap Cards on the field until your opponent's next End Phase

You can only Special Summon "Marincess Sea Horse" once per turn this way

and if your do Summon it this way

Noivern (101/131) [Sun & Moon: Forbidden Light] SM187 and it will remain revealedSet: Sun & Moon: Forbidden Light Type: Colorless Rarity: Rare Retreat cost: Colorless