Panic Spellbomb

The trick this artifact pulls is that its two halves are paid for at different times and answer to different masters. The tap-and-sacrifice ability is colorless: any deck can crack it to push a single attacker through, no red mana required. The card draw is the part that asks for a commitment, but it asks late, after the artifact has hit the graveyard, and only if you have a red mana to spare. That separation is the whole design logic. It lets the card slot into a colorless shell as pure utility while quietly rewarding the red deck that wants more. Note the trigger's exact shape: it fires when the artifact is put into a graveyard from the battlefield, so it cashes in off the sacrifice ability, off removal that destroys it, and off a sacrifice engine that eats it, but not off a bounce or an exile effect that never sends it to the yard. The Spellbomb cycle each pairs a generic colorless ability with a single colored mana for a card, and this is the one tuned for tempo: a half-point of evasion now, a fresh card whenever the body finally dies. It is small, deliberately so. The ceiling is replacing itself while shaving a blocker off the table, which makes it the kind of cheap artifact that lubricates a deck rather than carrying it.