Iida, the Psychometrist

+2: Create a colorless artifact token named Shard with "Sacrifice this artifact: Remove target creature from combat."
-3: Iida, the Psychometrist deals 2 damage to each of X target creatures and/or other planeswalkers, where X is the number of artifacts you control.
-8: You get an emblem with "At the beginning of your upkeep, scry X, then draw up to X cards, where X is the number of artifacts you control."