Cheapest priced copy (Time Spiral Remastered): $0.79 at Card Kingdom, near mint, their price list as of .
Mirri the Cursed 
Legendary Creature — Vampire Cat · 3/2 · Rare · The List · #TSR-125
Flying, first strike, haste
Whenever Mirri deals combat damage to a creature, put a +1/+1 counter on Mirri.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.79 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Planar Chaos | 75 | Rare | $1.49 | $19.99 |
| The List | TSR-125 | Rare | $0.99 | — |
| Time Spiral Remastered | 125 | Rare | $0.79 | $1.49 |
One ruling from Wizards of the Coast
- 19 March 2021If Mirri the Cursed is blocking or blocked by a creature that doesn't have first strike or double strike, Mirri will deal combat damage to that creature, then get a +1/+1 counter, then (if the other creature survived) Mirri will be dealt combat damage.