(https://i.imgur.com/3GszERE.png)
1 "Unknown Hero" Tuner + 1 "Unknown Hero" non-Tuner Ritual Monster
If this card is Synchro Summoned: You can add 1 card from your hand to your opponent's hand; draw 2 cards. Once per turn, you can discard 1 card; add 1 "Unknown Hero" Spell/Trap Card from your Deck or GY to your hand. If this card leaves the field; draw 2 cards, then discard 1 card. You can only use each effect of "Unknown Hero Courier" once per turn.
(https://i.imgur.com/a139hXj.png)
1 "Unknown Hero" Tuner + 1 "Unknown Hero" non-Tuner Ritual Monster
If this card is Synchro Summoned: You can destroy as many of your opponent's Set cards as possible, up to the number of "Unknown Hero" monsters you control. If this card battles an opponent's monster: you can discard 1 "Unknown Hero" monster (Quick Effect); this card gains ATK equal to half of the ATK of that opponent's monster until the end of the Battle Phase. If this card is destroyed by battle or by a card effect: You can target 1 "Unknown Hero" Ritual Monster in your GY; Special Summon it, but its effects are negated, also banish it when it leaves the field. You can only use each effect of "Unknown Hero Night Raider" once per turn.
(https://i.imgur.com/G9fWh18.png)
1 "Unknown Hero" Tuner + 1 "Unknown Hero" non-Tuner Ritual Monster
If this card is Synchro Summoned: You can give control of this card to your opponent. While the owner of this card controls this card, its original ATK becomes 3000, also it cannot be destroyed by card effects. While the opponent of the owner of this card controls this card, this card cannot attack, change its battle position, be Tributed, or be used as a material for the Summon of a monster in the Extra Deck. If this card in its owner's control is destroyed by battle; your opponent cannot activate the effects of Spell or Trap Cards for the rest of this turn. You can only use this effect of "Unknown Hero Infiltraitor" once per turn.
(https://i.imgur.com/CE8xtYl.png)
1 "Unknown Hero" Tuner + 1 "Unknown Hero" non-Tuner Ritual Monster
Must be Synchro Summoned. If this card is Synchro Summoned: You can reveal 1 "Unknown Hero" Synchro Monster in your Extra Deck, except "Unknown Hero Corvus"; until the end of your next turn, this card gains that monster's effects. You can only use this effect of "Unknown Hero Corvus" once per turn. Up to twice per turn: You can Tribute 1 other "Unknown Hero" monster you control (Quick Effect); destroy 1 card your opponent controls. If this card leaves the field: You can pay half of your LP; Special Summon, from your Extra Deck, 2 "Unknown Hero" Synchro Monsters with different names from each other, except "Unknown Hero Corvus", but they cannot attack your opponent directly. You can only use this effect of "Unknown Hero Corvus" once per turn.