Poly

From MTG Salvation Wiki

From the Comprehensive Rules Poly Artifact (Obsolete) Some older cards used the term “poly artifact” on the card’s type line. They were artifacts that had activated abilities that don’t include the tap symbol. Cards that were printed with the term “poly artifact” now simply use “artifact.”

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Card types
Groups	Supertypes	Card types	Subtypes
Spell (non-permanent)		Instant	Trap	Arcane
		Sorcery
Permanent	Basic, Legendary, Snow, World	Artifact	Equipment, Fortification, Contraption
		Creature	(...)
		Enchantment	Aura, Shrine
		Land	(...)
		Planeswalker	(...)
Miscellaneous		Tribal	(...)
		Plane	(...)
		Vanguard
Obsolete	Mono, Poly, Continuous	Interrupt, Mana Source