Cannot be Normal Summoned or Set. Must be Special Summoned (from your hand) by Tributing 3 monsters you control, and cannot be Special Summoned by other ways. Negate the effects of all face-up monsters your opponent controls. Once per turn: You can target 1 monster your opponent controls; equip that target to this card, and this card gains ATK equal to half the ATK of that equipped monster (you can only equip 1 monster at a time to this card with this effect).
Cards that can give you multiple monsters or tokens can quickly let you summon Plasma in a turn. Cosmic Compass is can be a good and quick turn around card even when you have no monsters on the field since you can normal summon into special summon.
Tributes for cost
Treats monsters as Equip Cards / Negates the effects of Effect Monsters
Buster Blader's effect has no relevance to Plasma's negation in the first place. It's not an activated effect. Plasma will negate Buster Blader, and will do so before it can even change it to Defence. Doesn't matter who controls what, or which hit the field first.
"the funniest shit ever is when people try to hit this card with the massivemorph/amazoness swords woman combo"
This is what makes this card so good. It's rather "obscure", not many players use it and don't know of it's negating effect which is very useful.
Hope it continues to be underused, because it makes a good "surprise" to unexpected opponents who don't know of what it can do.
just got tilted by this guy in a fur hire mirror match.
It wouldn't even if it were a Normal Summon. Most, if not all, monsters that require 3 Tributes (such as God Cards or Steelswarm Hercules) can't be Normal Summoned WITHOUT doing so, preventing Mausoleum being used.
The real hero who rapes all the satanic archtypes in the game aka fur hire