Set Phasers to . . .

Less decisive than Flashfreeze (62), but one mana to kill small attackers or stall a larger threat is credible anti-aggro interaction.

Could be wrong if If attacking creatures commonly exceed three toughness or white control shells lack room for conditional answers, it may remain a sideboard test.

Far narrower than Fatal Push (96), but the one-mana modal defense can earn sideboard slots against creature-heavy aggro decks.

Could be wrong if Pioneer threats may be too large, noncombat-centric, or better answered by unconditional removal.

It is cheaper but much less reliable than Celestial Purge (50); killing only attacking three-toughness creatures limits it to narrow combat matchups.

Could be wrong if A very creature-combat-heavy metagame could make the efficient stun mode and mirror utility more valuable than expected.

Swords to Plowshares (87) is dramatically more reliable at the same mana; temporary stun and attack-only damage lack a clear Legacy niche.

Could be wrong if White pitch-card utility or a specific combat matchup could create a small sideboard role.

Less flexible than Fiery Temper (58), but one mana answers many attacking creatures and stuns larger ones for defensive white shells.

Could be wrong if If key attackers exceed three toughness or white decks prefer permanent removal, its conditionality will keep it out.

It is heavily outclassed by Swords to Plowshares (84): neither temporary stun nor three damage to an attacker solves multiplayer threats.

Could be wrong if Unrevealed stun-counter synergies could give it a narrow thematic inclusion.

One mana to punish small attacks, or deny a larger creature an untap step, is efficient flexible defense but not unconditional removal.

Could be wrong if Format speed, creature toughness, and removal density are unknown; abundant large creatures would lower its value.