Badgey, Malicious Glitch

A four-mana 4/3 without an immediate effect is below Modern rate; its one-point tap drain needs an unproven artifact or tapping engine.

Could be wrong if An existing or newly printed repeatable artifact-tapping shell could make the trigger a worthwhile payoff.

Legacy's efficient threats and interaction leave little room for a four-mana creature that only drains when it attacks or is externally tapped.

Could be wrong if A resilient artifact-combo shell that taps it repeatedly could give the trigger more value than expected.

Repeated tapping drains every opponent, giving it multiplayer upside, but a fragile four-mana body with no built-in tap outlet is a narrow payoff.

Could be wrong if The density and quality of repeatable tap/untap enablers will determine whether it is more than an attacker.

A four-mana 4/3 normally makes decks, and each attack adds a useful one-life drain; it is strong board material rather than a bomb.

Could be wrong if Unknown set speed, creature sizing, removal, and artifact synergies could substantially shift its pick order.