Subterror Behemoth Umastryx | Deck and Rulings

This page notes details of Subterror Behemoth Umastryx (EARTH/Reptile/Flip monster/Effect Monster) : decks, tips, effect and rulings. Learn and enjoy playing Yu-Gi-Oh! Duel Links!
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update 10/03/2020

Subterror Behemoth Umastryx

Subterror Behemoth Umastryx
Monster TypeReptile
Card typeFlip / Effect
Card Effect TypeFlip effect / Condition / Trigger Effect / Ignition Effect


FLIP: You can target 1 monster your opponent controls; banish it. You can only use this effect of "Subterror Behemoth Umastryx" once per turn.When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.

How to Get

PackBlazing Rose [SR]
Level-up reward--
Victory against--
Card trader--




  • Banishes your opponent’s monster.
  • Can reuse removal effect.
  • Has own Special Summoning condition.


  • Relatively weak attack stat.
  • Flip effects can be slow.



All Subterror Behemoth monster have the shared Special Summoning condition of “When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position.” and the effect of flipping themselves face-down, so once you get one Subterror Behemoth on the field it would be easy to get more on the field. The problem is that all Subterror Behemoths are high-leveled monsters. Some like Subterror Behemoth Dragossuary and Subterror Behemoth Stygokraken can be summoned with only 1 tribute to get Subterror summonings going. You can also use Subterror Nemesis Warrior to Special Summon Subterror monsters.

Subterror Final Battle

This is the best support Subterrors have. The first and second effects hasten the activation of your Subterror’s effects. The third effect gives your monster a massive boost in stats, which could be enough to OTK your opponent. The fourth effect provides protection to your Subterrors while they activate their effects. All while being reusable because it sets itself back to your backrow after use.

The downside is you can only choose one of these effects per activation. But you can set multiple copies of this card and use all of them every turn.


An archetype with Flip Summons as part of their strategy with support that puts them face-down to be Flip Summoned again. You can mix some Subterrors into their deck for more powerful and easy to summon monsters.


Ghostricks are another archetype with lots of Flip Summoning. They can turn themselves face-down every turn, similar to Subterror Behemoths do. Ghostricks lack power with their own monsters, so mixing in some Subterrors can be beneficial.

Other Flip Effects

Here are some other monsters with good Flip effects and are able to flip themselves back down.


Subterror Deck



ActionsFlips itself face-down / Changes battle positions
Banished categoriesBanishes from your opponent's field
Summoning categoriesSpecial Summons itself from your hand


Hot New Top
This card does not target even though it's written so in its text.
<< Anonymous
Anonymous Reply
...Yes it does.

Tip: You cannot chain Red-Eyes Slash Dragon's effect to the effect of Subterror Nemesis Warrior, since it does not target anything. >.>
it targets one monster right why red eyes slash can't negate its effect?
<< Anonymous
Anonymous Reply
Maybe he active final battle before red eyes able to chain anything. Thats why final attack basically OP , just like what DKayed said.
<< Anonymous
Anonymous Reply
No it's because subterror nemisis warrior chain blocked you. Dkayed said that final battle's negation prevation doesn't work on Red Eyes Slash.
The irony with Subterror being a archetype with 12 different monsters in Duel Links and seeing only the same one all over.
<< Anonymous
Anonymous Reply
That’s because this and the level 4 are the only good ones- until we get Fiendess and Guru
<< Anonymous
Anonymous Reply
Yeah, I was exagerating of course, but globally ; Umastryx, perhaps 1 or 2 Stygokraken, 2-3 Nemesis Warrior, 2-3 Golem Sentry, Final Battle, and that's it.

I don't get how a monster that is so easy to summon can have such an effect. The other monsters don't even begin to compare with that.

Though obviously against decks that spam, they might have more trouble.
I prefer being against six samurai in all matches again. Forbid this deck all over
<< Anonymous
Anonymous Reply
I know it’s decks like these that are ruining this game
<< Anonymous
Anonymous Reply
Yes please
This deck beyond broken only rare cards

Now that Subterror and Metaphys have been taken care of, any chance there's a Black Rose Synchro recipe in the works?
Uuuuhhhh it looks like Godzilla
If someone canadia's your card you can special summon this card. You can flip it face down once a turn and banish a monster when flipped up. Pretty good.
One weakness is when it's flipped up by yourself it'll have only 2000 attack.
<< Anonymous
Anonymous Reply
Use Universe trap to switch atk and defense
<< Anonymous
Anonymous Reply
I think if you flip it face-down you lose the stat change from Inverse Universe.
It looks like drillgate (drilldark) became a huge reptile type monster.
ok but were is Guru
<< Anonymous
Anonim Reply
And archer

Commens and feedback


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how to unlock the skill? I have to summon 1 level/rank 7 Dragon 3 times or what?
when varis comes, we will have a good generic link 3 at last
Why can they activate the trap in the same turn?
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