(4/8/2016) The card types in Magic are artifact, battle, creature, enchantment, instant, kindred, land, planeswalker, and sorcery
Furthermore, the card is also useful when it is special summoned, as it can destroy a spell/trap card that the opponent controls, which makes Traptrix Myrmeleo one of the best Insect-type monsters ever printed
So this makes it easily the most nostalgic trap card in Yu-Gi-Oh
Whenever another artifact you control with mana value 3 or greater enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control." If the mana cost of an artifact on the battlefield includes , X is 0 for the purpose of determining its mana value
even though it's best used in the same situation, it's certainly not as abusable
4 Infinite Impermanence Is One Of The Few Trap Cards That Is Considered A Staple Infinite Impermanence is a very flexible card as, while it's a Trap card, it can be played from the hand if that player has no other cards on the field