"Vassal" (帝家臣, Teikashin) is a series of monsters with 800 ATK & 1000 DEF related to the "Monarchs", with each of its members possessing an Attribute reflective of the element they control. All "Vassal" monsters have an effect that allows them to be Special Summoned from the hand, but, with the exception of "Escher the Frost Vassal", at the additional cost of disabling the Player who summoned them to Special Summon from the Extra Deck for the rest of the turn.
With the exception of "Escher", all "Vassal" Monsters also have an effect that activates from the Graveyard after being Tributed for a Tribute Summon.
They are used to support the "Monarch" series through easy Special Summoning effects and effects upon being Tributed for Tribute Summons.
|| Corresponding Monarch
| To Special Summon from the hand
|| When Tributed for a Tribute Summon
|| Discard 1 card.
|| You can look at your opponent's hand and banish 1 card from their hand until the End Phase.
|| Mobius the Frost
|| Your opponent must control 2 or more cards in their Spell & Trap Zones.
|| Return 1 Tribute Summoned monster you control to the hand.
|| You can add 1 monster with 800 ATK and 1000 DEF from your Deck to your hand, except "Garum the Storm Vassal".
|| Change 1 face-up monster your opponent controls to face-down Defense Position.
|| You can add 1 monster with 800 ATK and 1000 DEF from your Graveyard to your hand, except "Landrobe the Rock Vassal".
|| Banish 1 Level 5 or higher monster from your Graveyard.
|| You can look at all Set cards your opponent controls, and your opponent cannot respond with cards or effects to this effect.
|| Special Summon 1 "Vassal Token" to your opponent's side of the field in Defense Position.
|| You can Tribute Summon 1 monster during your Main Phase this turn, in addition to your Normal Summon/Set.
While not true members of the series due to their names, these monsters do fit into the Vassal theme.
|| Corresponding Monarch
| When Normal or Special Summoned
|| You can Special Summon 1 monster with 800 ATK and 1000 DEF from your Deck, except "Edea the Heavenly Squire".
|| If this card is sent to the Graveyard: You can target 1 of your banished "Monarch" Spell/Trap Cards; add it to your hand.
|| You can activate this effect; you can Tribute Summon 1 monster during your Main Phase this turn, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.)
|| You can banish this card from your Graveyard, then target 1 monster with 800 ATK and 1000 DEF in your Graveyard, except "Eidos the Underworld Squire"; Special Summon it in Defense Position.
- ↑ McHale, Jerome. "March of the Mini-Monarchs!". Konami.com. https://yugiohblog.konami.com/articles/?p=7578.