Whenever a nontoken creature enters, if this artifact is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.

Indestructible (Effects that say "destroy" don't destroy this artifact.) Myr creatures get +1/+1. {5}: Create a 1/1 colorless Myr artifact creature token.

{T}: Create a 1/1 colorless Myr artifact creature token. {T}, Tap five untapped Myr you control: Search your library for a Myr creature card, put it onto the battlefield, then shuffle.

You may have this artifact enter as a copy of any artifact on the battlefield.

Whenever another creature you control enters, each opponent loses 1 life.

Whenever a creature you control enters, put a +1/+1 counter on each creature you control.

Whenever a creature enters, that creature's controller may have target creature of their choice get -3/-3 until end of turn.

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.