Cheapest priced copy (Assassin's Creed): $0.35 at Card Kingdom, near mint, their price list as of .
Monastery Raid 
Sorcery · Uncommon · Assassin's Creed · #35
Freerunning {X}{R} (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.)
Exile the top two cards of your library. If this spell's freerunning cost was paid, exile the top X cards of your library instead. You may play the exiled cards until the end of your next turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Assassin's Creed | 35 | Uncommon | $0.35 | $0.49 |
| Assassin's Creed | 217 | Uncommon | — | — |
2 rulings from Wizards of the Coast
- 5 July 2024Once an Assassin creature or commander you control deals combat damage to a player in a turn, you can cast spells for their freerunning costs for the rest of that turn. It doesn’t matter what happens to that Assassin or commander after that.
- 5 July 2024You pay all costs and follow all normal timing rules for cards played this way. For example, if one of the exiled cards is a land card, you may play it only during your main phase while the stack is empty.