Cheapest priced copy (Core Set 2020): $3.49 at Card Kingdom, near mint, their price list as of .
Tale's End 
Instant · Rare · Core Set 2020 · #77
Counter target activated ability, triggered ability, or legendary spell.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $3.49 to $8.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 77 | Rare | $3.49 | $8.99 |
| Core Set 2020 Promos | 77p | Rare | $4.99 | $7.99 |
| Core Set 2020 Promos | 77s | Rare | — | $8.49 |
5 rulings from Wizards of the Coast
- 12 July 2019Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities are triggered abilities and will have "when," "whenever," or "at" in their reminder text.
- 12 July 2019Tale's End can't target an activated or triggered mana ability. An 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 as it resolves and triggers on an activated mana ability.
- 12 July 2019If you counter a delayed triggered ability that triggered at the beginning of the "next" occurrence of a specified step or phase, that ability won't trigger again the following time that step or phase occurs.
- 12 July 2019Activated abilities are written in the form "[Cost]: [Effect]." Some keyword abilities (such as equip) are activated abilities and will have colons in their reminder texts, if applicable.
- 12 July 2019Abilities 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.