You can cast Daring Discovery with no targets and just discover 4. However, if you choose any targets, and all of those targets are illegal by the time Daring Discovery tries to resolve, it won't resolve and none of its effects will happen. You won't discover 4. As long as one target remains legal, any legal targets won't be able to block this turn, any illegal targets won't be affected, and you'll discover 4.
If you discover an adventurer card, split card, or modal double-faced card, you might be able to cast that card with either set of characteristics depending on the effect's discover value. For example, if you discover 4 and reveal Galvanic Giant (an adventurer card from Wilds of Eldraine with a mana value of 4), you could cast Galvanic Giant, but not Storm Reading (its Adventure, which has a mana value of 7). If you discover 7 and reveal Galvanic Giant, you could cast either Galvanic Giant or Storm Reading.
Last observed on Scryfall 2 months ago at $0.24. Over the trailing 90 days the price moved between $0.03 and $0.24 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 #142 of *The Lost Caverns of Ixalan*, the set that shipped alongside the November 2023 The Lost Caverns of Ixalan release.
Card type: Sorcery, color identity red, printed at common. Commons fill the bulk of a booster pack's volume. Mana cost: {4}{R} (5 converted). Keyword abilities: Discover.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #11,720 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Michele Giorgi. Rarix catalogs 125 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Michele Giorgi
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
You exile the cards face up. All players will be able to see them.
The mana value of a split card is determined by the combined mana cost of its two halves. If discover allows you to cast a split card, you may cast either half (as long as its mana value is less than or equal to the effect's discover value) but not both halves.
Some spells and abilities that cause you to discover may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve and you won't discover.
If you can't cast the discovered card (perhaps because there are no legal targets for the spell), you'll put it into your hand.
If the discovered card has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
When you discover, you must exile cards. The only optional part of the ability is whether you cast the exiled card or put it into your hand.
If you cast a spell "without paying its mana cost", you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the spell has any mandatory additional costs, you must pay those to cast it.
A spell's mana value is determined only by its mana cost. Ignore any alternative costs, additional costs, cost increases, or cost reductions.
