SURGE FOILCheapest priced copy (Doctor Who): $0.79 at Card Kingdom, near mint, their price list as of .
Flatline 
Instant · Rare · Doctor Who · #648
Creatures your opponents control have base power and toughness 0/1 until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.79 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Doctor Who | 43 | Rare | $0.79 | $1.49 |
| Doctor Who | 358 | Rare | $2.79 | $1.99 |
| Doctor Who | 648 | Rare | — | $1.99 |
| Doctor Who | 949 | Rare | — | $2.99 |
2 rulings from Wizards of the Coast
- 13 October 2023Flatline affects only creatures your opponents control at the time it resolves. Creatures they begin to control later in the turn won't change power and toughness.
- 13 October 2023Flatline overwrites any effects that set a creature's power and toughness. Any existing effects or counters that raise, lower, or switch a creature's power and/or toughness continue to apply to the creature's newly-set power and toughness.