Legal in
Standard, Pioneer, Modern, Legacy, Vintage, Commander, Oathbreaker, Brawl, Historic, Timeless
Rulings (10)
If the target artifact or creature has X in its mana cost, that X is 0 when determining its mana value.
2023-11-10
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.
2023-11-10
You exile the cards face up. All players will be able to see them.
2023-11-10
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.
2023-11-10