InYu-Gi-Oh!, the strength of a boss monster is often defined by what kind of effect they have on other cards in the game and how hard they are to get rid of. Many boss monsters have fantastic on-field effects but lack built-in protection/immunities. Most boss monsters that see competitive play at least have immunity to destruction effects or immunity to targeting, which makes them much harder to get rid of once they hit the field compared to other monsters.
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This is good because most powerful boss monsters require a lot of resources to make, so their built-in immunities ensure that the opponent will have to invest resources to get rid of them. Even with these basic concepts of boss design in mind, some boss monsters inYu-Gi-Oh!are just a cut above other boss monsters. These boss monsters are unaffected by card effects, meaning the only way to get rid of them is to either destroy them by battle or tribute them with something like Lava Golem, Super Poly, or a Kaiju.
6Dark Magician the Dragon Knight + Eternal Soul
Dark Magician the Dragon Knight is afusion monsterthat requires Dark Magician and 1 dragon-type monster to be used as fusion material for its summon. While on the field, Dragon Knight protects all spells and traps the user controls from targeting and destruction effects. Dragon Knight on its own doesn’t actually have any inherent protection; it is only when paired with the continuous trap card Eternal Soul that the card gains its boss monster status.
Eternal Soul makesall Dark Magiciansin the user’s monster card zone unaffected by card effects. It also has the effect to special summoning a Dark Magician from the graveyard once per turn. Dark Magician the Dragon Knight identifies as Dark Magician while on the field and in the graveyard, so all of Eternal Soul’s effects work on it.
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With these two cards on the field, the user gets a 3000 Atk monster that is unaffected by card effects, that protects the user’s back-row from targeting and destruction effects, and if Dragon Knight is ever sent to the graveyard, Eternal Soul can revive it.
5Geomathmech Final Sigma
Geomathmech Final Sigma is a level 12 synchro monster that requires one tuner and at least one non-tuner monster to be used as materials for its synchro summon. Final Sigma isunaffected by all effectsexcept the effects of Mathmech monsters while it is in the extra monster zone. Final Sigma can inflict double battle damage to monsters it battles. It also has a search effect when destroyed by battle or card effects that add a Mathmech monster from the deck to the hand.
Final Sigma’s only real downsides are its requirement of being in the extra monster zone in order to gain its powerful effects. This requirement effectively locks the user out of link monsters which provide many decks with powerful utility options. Final Sigma’s protection doesn’t apply during Mathmech mirror matches, and considering Mathmech’s popularity in Master Duel, this issue comes up more often than most players would like.
4Psychic End Punisher
Psychic End Punisher is a level 11 synchro monster that requires one tuner monster and at least one non-tuner monster to be used as material for its synchro summon. Punisher gains the effect of being unaffected by card effects so long as the user’s life points are lower than their opponent’s.
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To help reach that requirement, Punisher has a secondary effect that allows the user to pay 1000 life points, then target a monster on both sides of the field; those two monsters are then banished. This card’s final effect allows it to gain Atk equal to the difference in the user’s life points from their opponents. This effect can allow Punisher to be virtually impossible to attack over by most monsters.
3Blackwing Full Armor Master
Blackwing Full Armor Master is a level 10 synchro monster that requires 1 black wing tuner and at least one non-tuner monster to be used as material for its synchro summon. This card is alwaysunaffected by card effectsno matter where it is on the field or where it’s been special summoned from.
Blackwing Full Armor Master has the effect to place a wedge counter on monsters the opponent controls who use effects. Once per turn, the user can take control of one monster the opponent controls that has a wedge counter on it. This card can also use its effect during the end phase to destroy all cards the opponent controls that have wedge counters on them.
2Number 86: Heroic Champion - Rhongomyniad
Number 86: Heroic Champion - Rhongomyniad is a rank 4 XYZ monster that requires 2 or more level 4 monsters to be used as material for its summon. Rhongo gains effects based on the number of materials it has attached to it. At 1 material, Rhongo can’t be destroyed by battle.
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At 2 materials, it gains 1500 Atk and defense. At 3 materials, Rhongo becomes unaffected by card effects. At 4 materials, it locks the opponent out ofnormal and special summoning monsters. Finally, at 5 materials, Rhongo can destroy all cards the opponent controls. Rhongo must detach 1 material from itself during the opponent’s end phase.
1Underworld Goddess of the Closed World
Underworld Goddess of the Closed World is a link 5 monster that requires 4+ effects monsters to be used as materials for its link summon. The user can also use one monster on the opponent’s side of the field as material for this card’s summon. When Underworld Goddess islink summoned, the summoner can negate the effects of all special summoned monsters on the opponent’s side of the field.
Underworld Goddess is unaffected by the opponent’s activated effects after it’s been linked summoned unless they specifically target this card. This might seem like a problem, but Underworld Goddess also has the effect to negate the activation of a card or special summoned monster’s effect once per turn.
Yu-Gi-Oh! Mater Duelis available for Nintendo Switch, PlayStation 4, PlayStation 5, Xbox One, Xbox Series X/S, and PC.
