They often have high power and toughness balanced by a high casting cost
If you pay one White mana and tap them you can sacrifice an Artifact to Search your library for an Artifact card with mana value equal to 1 plus the sacrificed Artifacts mana value
Creatures (20) 4 White Knight 2 Serra Angel 4 Order of the White Shield 4 Savannah Lions 2 Phyrexian War Beast 4 Order of Leitbur Lands (24) Spells (16) Tom Chanphengs white aggro deck was an unlikely dark horse in a sea of Necropotence decks as far as the eye could see
Any creature you control that can't be targeted by the copied ability (due to protection abilities, targeting restrictions, or any other reason) is just ignored
This card requires a lot of creatures in hand, but does not require any on board investment (besides mana) or for your opponent to do anything in particular
The hands of a Mirran, flesh intertwined with metal, clutch an immaculate pendant orb encasing a gem on Mox Opal