Opal Acrolith (USG #22)

Opal Acrolith is a uncommon printing from Urza's Saga (USG #22), a Enchantment. Illustrated by Robh Ruppel.
Card text
Whenever an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 2/4 Soldier creature.
{0}: This permanent becomes an enchantment.
Details
| Mana cost | {2}{W} |
|---|---|
| Type | Enchantment |
| Rarity | Uncommon |
| Set | Urza's Saga (USG) |
| Collector number | 22 |
| Artist | Robh Ruppel |
| Released | 1998-10-12 |
Current price
As of 2026-10-19, Scryfall listed this printing at non-foil $0.26 (USD). Prices change constantly, so check the live price before buying.
Buy Opal Acrolith on TCGplayer
Legality
| Standard | Not legal |
|---|---|
| Future Standard | Not legal |
| Historic | Not legal |
| Timeless | Not legal |
| Gladiator | Not legal |
| Pioneer | Not legal |
| Modern | Not legal |
| Legacy | Legal |
| Pauper | Not legal |
| Vintage | Legal |
| Penny Dreadful | Not legal |
| Commander | Legal |
| Oathbreaker | Legal |
| Standard Brawl | Not legal |
| Brawl | Not legal |
| Competitive Brawl | Not legal |
| Alchemy | Not legal |
| Pauper Commander | Not legal |
| Duel Commander | Legal |
| Old School | Not legal |
| Premodern | Legal |
| PrEDH | Legal |
| TLR | Legal |
Keep exploring
Search the MTGBrew card database for more cards, or build a deck with the AI Deck Builder.
Rulings
- October 4, 2004 — When it turns into an enchantment, it is no longer a creature.
- October 4, 2004 — Changes into a creature even if the spell is countered.
- October 4, 2004 — When it turns into a creature, it is no longer an enchantment.
- October 4, 2004 — It triggers when the spell is cast, which means it becomes a creature before that spell resolves.
- April 1, 2008 — A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.
- August 1, 2008 — A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.
