JonTron, Gaming ECHpert

+2: Up to one target creature gains flying and vigilance until end of turn.
-3: You may destroy target artifact. If you do, put X 1/1 blue bird creature tokens with flying, where X is the artifact's combined mana cost.
-6: Destroy all artifacts you don't control. For each artifact destroyed this way, JonTron deals 5 damage to target creature or player.