Krenko's Buzzcrusher

Land destruction with a body attached, and the "up to one" clause is the whole design lever. The enters trigger reaches every player, but it caps at a single nonbasic each and hands every hit player a basic from their library as a tapped replacement. That two-part structure keeps it from playing like Armageddon: nobody ends up landless, and the swing comes from stripping what the nonbasics were doing (the utility lands, the fetch-fixed duals, the manlands and value engines) while leaving everyone on untapped-next-turn basics. What "up to one" also does is put the caster in control of the symmetry. Nothing forces you to blow up your own land; if you are running basics or simply value your fixing, you decline for yourself and destroy across the table, which is where the "symmetrical" reading breaks down. The mode is elastic: cast it into a mirror of greedy manabases and it reads as a fair reset, cast it from a mono-color base and it reads as one-sided disruption, and the player casting it decides which. Stapling that to a 4/4 flier with trample is what makes it worth the four mana rather than a spell slot: the disruption arrives with a clock, so opponents are rebuilding a manabase while taking evasive hits. The goblin-artifact framing is flavor over a genuinely flexible bit of design, a targeted-destruction effect whose fairness is a choice rather than a rule.