ETCHEDCheapest priced copy (Assassin's Creed): $0.49 at Card Kingdom, near mint, their price list as of .
Tax Collector 
Creature — Human Advisor · 2/2 · Uncommon · Assassin's Creed · #182
When this creature enters, choose one —
• Tax — Until your next turn, spells your opponents cast cost {1} more to cast.
• Arrest — Detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Assassin's Creed | 9 | Uncommon | $0.49 | $0.49 |
| Assassin's Creed | 182 | Uncommon | — | — |
6 rulings from Wizards of the Coast
- 5 July 2024Activated abilities include a colon and are written in the form “[cost]: [effect].” No one can activate any activated abilities, including mana abilities, of a detained permanent.
- 5 July 2024If a noncreature permanent is detained and later turns into a creature, it won’t be able to attack or block.
- 5 July 2024The static abilities of a detained permanent still apply. The triggered abilities of a detained permanent can still trigger.
- 5 July 2024When a player leaves a multiplayer game, any continuous effects with durations that last until that player’s next turn or until a specific point in that turn (such as the effect of being detained) will last until that turn would have begun. They neither expire immediately nor last indefinitely.
- 5 July 2024If a creature is already attacking or blocking when it’s detained, it won’t be removed from combat. It will continue to attack or block.
- 5 July 2024If a permanent’s activated ability is on the stack when that permanent is detained, the ability will be unaffected.