If that artifact had counters on it, put that many +1/+1 counters or charge counters on an artifact you control
Huge bodies and annihilator creatures can close out games in a hurry, it's just a matter of consistently getting your expensive creatures on the battlefield first
Last we have Swift Reconfiguration, a very powerful way to suck the life out of an enemy creature
Promo Info BOOSTER BEGINNING OBSERVER [BT-16] CLOSECLOSE BT16-003 U Digi-Egg Lv.2 Upamon Color Yellow Form In-Training Attribute - Type Amphibian DP - Cost - Digivolve Cost 1 - Digivolve Cost 2 - Upper Text - Lower Text [Opponent's Turn] While this Digimon has 2 or more colors, it gains Blocker
I like my cards, and Im not that excited about discarding them, and this is often just going to be a really horrible Thoughtseize, so I didnt try it out, but I could easily see it exceeding my expectations