Humphreys did mention that only Enchantments and Artifacts will have Channel in order to simplify things
While some equipment may well win the game in conjunction with certain effects and creatures, they are less impactful outside of these interactions and wont serve your collection quite as well
Creature Artifact - Golem Canoptek Tomb Sentinel Vigilance Exile Cannon When this creature enters from a graveyard, exile up to one target nonland permanent
---------------- Starscream, Seeker Leader Living metal (As long as it's your turn, this Vehicle is also a creature.) Flying, menace, haste Whenever Starscream deals combat damage to a player, if there is no monarch, that player becomes the monarch
Company: Wizards of the Coast Series: Mirrodin Besieged Item Type: Single Card Brand: Magic The Gathering Release Date: February 2011 UPC: 0666714299729 Stock #: 95598 Our Guarantees to You, Our Valued Customer
She requires to swing to get her effect, so you can disrupt effects like Whispersilk Cloak that will ensure she can get in hits with impunity