ETCHEDCheapest priced copy (Secret Lair Drop): $6.49 at Card Kingdom, near mint, out of stock, their price list as of .
Training Grounds 
Enchantment · Rare · March of the Machine: The Aftermath · #109
Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
11 printings · $6.49 to $34.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine: The Aftermath | 9 | Rare | $11.99 | $10.99 |
| March of the Machine: The Aftermath | 59 | Rare | $10.99 | $11.99 |
| March of the Machine: The Aftermath | 109 | Rare | — | — |
| March of the Machine: The Aftermath | 155 | Rare | $12.99 | $12.99 |
| March of the Machine: The Aftermath | 193 | Rare | — | $24.99 |
| Judge Gift Cards 2022 | 6 | Rare | — | $27.99 |
| The List | ROE-91 | Rare | $11.99 | — |
| March of the Machine: The Aftermath Promos | 9p | Rare | $17.99 | $15.99 |
| Rise of the Eldrazi | 91 | Rare | $11.99 | $34.99Out of stock |
| Secret Lair Drop | 2619 | Rare | $6.49Out of stock | $7.99 |
| Avatar: The Last Airbender Eternal | 20 | Mythic | $8.99 | $14.99 |
8 rulings from Wizards of the Coast
- 15 June 2010Training Grounds won't affect a cost that isn't the cost to activate a creature's activated ability. For example, it won't affect Flameblast Dragon's {X}{R} cost, since that's a cost paid when a triggered ability resolves, and it won't affect a kicker cost, since that's an additional cost to cast a spell. Activated ability costs appear before a colon (:) in a card's rules text, or, in the case of some keywords, before a colon in reminder text.
- 2 October 2025If an activated ability of a creature you control costs no generic mana to activate (for example, if it costs {R}{R}, it costs {0}, or it costs only nonmana actions such as {T} or "Sacrifice a creature"), Training Grounds simply won't affect it. In particular, it won't increase the cost to include a mana payment of {1}.
- 2 October 2025Training Grounds won't affect the part of an activation cost represented by colored mana symbols or snow mana symbols. It also won't affect nonmana parts of an activation cost, if there are any.
- 2 October 2025Training Grounds takes the total cost to activate a creature's activated ability into account, not just the cost printed on it. For example, Urabrask has an activated ability that costs {R}, and Suppression Field says "Activated abilities cost {2} more to activate unless they're mana abilities." Since activating Urabrask's activated ability would now cost {2}{R}, Training Grounds reduces that cost back to {R}.
- 2 October 2025Training Grounds affects only creatures you control on the battlefield. The costs of activated abilities that work in other zones (such as cycling or unearth) won't be reduced.
- 2 October 2025Training Grounds can reduce the amount you pay for a creature's activated ability cost that includes {X}. For example, Drana, Kalastria Bloodchief has an activated ability that costs {X}{B}{B}. If you control Training Grounds and you activate the ability with X equal to 5, you'll have to pay only {3}{B}{B}. This is true even if the ability states that {X} must be paid with a certain color of mana, as Crimson Hellkite's ability does.
- 2 October 2025Training Grounds can reduce the part of an activation cost represented by generic mana symbols down to nothing, as long as it still costs at least one mana. For example, if an activation cost is {2}{G}, you'd have to pay only {G}. If an activation cost is {2}, though, you'd still have to pay {1}.
- 2 October 2025Training Grounds reduces the generic mana in waterbend costs for activated abilities. It will not reduce waterbend costs that are additional costs for casting spells.