Cheapest priced copy (Star Trek Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Disallow 
Instant · Rare · Star Trek Commander · #436
Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.49 to $34.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aether Revolt | 31 | Rare | $1.29 | $7.99 |
| Aetherdrift Commander | 74 | Rare | $0.79 | — |
| Aether Revolt Promos | 31p | Rare | $5.49 | $34.99 |
| Aether Revolt Promos | 31s | Rare | — | $9.99 |
| Star Trek Commander | 253 | Rare | $0.99 | $0.99 |
| Star Trek Commander | 436 | Rare | $0.49 | $4.99 |
6 rulings from Wizards of the Coast
- 9 February 2017Activated abilities are written in the form "Cost: Effect." Some keyword abilities, such as equip and crew, are activated abilities and will have colons in their reminder texts.
- 9 February 2017If you counter a delayed triggered ability that triggers at the beginning of the "next" occurrence of a specified step or phase, that ability won't trigger again the following time that phase or step occurs.
- 9 February 2017An activated mana ability is one that could add mana as it resolves, doesn't have a target, and isn't a loyalty ability. A triggered mana ability is one that could add mana and triggers on an activated mana ability.
- 9 February 2017Abilities that create replacement effects, such as a permanent entering the battlefield tapped or with counters on it, can't be targeted. Abilities that apply "as [this creature] enters the battlefield" are also replacement effects and can't be targeted.
- 9 February 2017Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities, such as prowess and fabricate, are triggered abilities and will have "when," "whenever," or "at" in their reminder text.
- 19 January 2018There are many important moments in the story, but the most crucial—called "story spotlights"—are shown on cards. These cards have the Planeswalker symbol in their text box; this symbol has no effect on gameplay. You can read more about these events in the official Magic fiction at http://www.mtgstory.com.