Cheapest priced copy (Kaldheim Commander): $0.35 at Card Kingdom, near mint, their price list as of .
Twinblade Assassins 
Creature — Elf Assassin · 5/4 · Uncommon · Core Set 2021 · #226
At the beginning of your end step, if a creature died this turn, draw a card.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kaldheim Commander | 95 | Uncommon | $0.35 | — |
| Core Set 2021 | 226 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 23 June 2020If a creature didn't die before your end step begins, the ability of Twinblade Assassins doesn't trigger at all. The creature may have died before Twinblade Assassins entered the battlefield, however.
- 23 June 2020The triggered ability triggers just once, no matter how many creatures died this turn.