If attached to a creature, players are able to look at cards and play them from the top of their library
Seeing more cheap and accessible Wheel effects in red has done a lot to make it a viable color in a format where decks are large and card draw is so important
By paying X mana and tapping it, you can move X +1/+1 counters to another artifact, giving it haste as well until the end of the turn
By reducing your own spell costs while you tax opponents, it forces the game to slow down on your terms and makes it extremely difficult for other decks to resolve key spells efficiently
Its pretty 5-color soupy, but that hasnt stopped players before
Pauper Izzet Skred: Removal suite Im playing 4 Skred, 3 Galvanic Discharge, and 2 Suplex