The ability granted by Glowcap Lantern lets you look at the top card of your library whenever you want (with one restriction—see below), even if you don't have priority. This action doesn't use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.
If an ability instructs a creature to explore, its controller reveals the top card of their library. If it's a land card, they'll put it into their hand. Otherwise, they'll put a +1/+1 counter on that creature, then choose to either leave that card on top of their library or put it into their graveyard.
If the top card of your library changes while you're casting a spell, playing a land, or activating an ability, you can't look at the new top card until you finish doing so. This means that if you cast the top card of your library, you can't look at the next one until you're done paying for that spell.
Last observed on Scryfall 2 months ago at $0.26. Over the trailing 90 days the price moved between $0.03 and $0.26 across 46 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 3 catalogued treatments from LCI — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #187 of *The Lost Caverns of Ixalan*, the set that shipped alongside the November 2023 The Lost Caverns of Ixalan release.
Card type: Artifact — Equipment, color identity green, printed at uncommon. Uncommons fill the middle-tier slots in a standard booster configuration. Mana cost: {G} (1 converted). Keyword abilities: Explore and Equip.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #10,786 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Irina Nordsol. Rarix catalogs 326 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Irina Nordsol
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
If no card is revealed, most likely because that player's library is empty, the exploring creature receives a +1/+1 counter.
If Glowcap Lantern isn't attached to a creature you control, you can't look at the top card of your library. The lantern isn't that bright.
Once an ability that causes a creature to explore begins to resolve, no player may take any other actions until it's done. Notably, opponents can't try to remove the exploring creature after you reveal a nonland card but before it receives a counter.
In some unusual cases, noncreature permanents may explore. For example, if the creature card returned by Defossilize is somehow not a creature once it's on the battlefield, it can still explore. You'll take all the same actions, and you may end up putting a +1/+1 counter on the permanent. (Note that some effects target a creature, and those effects would still require a legal target to have it explore.)
Some spells or abilities might cause a creature to explore multiple times in a row. If you reveal a nonland card when a creature explores and leave it on top of your library, then the creature explores again immediately afterwards, you'll reveal the same card again.
If a resolving spell or ability instructs a specific creature to explore but that creature has left the battlefield, the creature still explores. If you reveal a nonland card this way, you won't put a +1/+1 counter on anything, but you may put the revealed card into your graveyard. Effects that trigger "whenever a creature explores" trigger as appropriate.
