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Graven Lore

Card Name

Graven Lore

Mana Cost

3

Type

Snow Instant

Rarity

Rare

rules Text

Scry X, where X is the amount of spent to cast this spell, then draw three cards.

Legal Formats

Commander, Explorer, Historic, Legacy, Modern, Pioneer, Vintage

Not Legal Formats

Alchemy, Brawl, Pauper, Standard

Rulings

(2/5/2021)
If you cast Graven Lore without spending snow mana, you'll just draw three cards.
(2/5/2021)
If Graven Lore is copied, no mana was spent to cast the copy, so you'll just draw three cards.
(2/5/2021)
Snow is a supertype, not a card type. It has no rules meaning or function by itself, but spells and abilities may refer to it.
(2/5/2021)
The {S} symbol is a generic mana symbol. It represents a cost that can be paid by one mana that was produced by a snow source. That mana can be any color or colorless.
(2/5/2021)
Snow isn't a type of mana. If an effect says you may spend mana as though it were any type, you can't pay for {S} using mana that wasn't produced by a snow source.
(2/5/2021)
Some cards have additional effects for each {S} spent to cast them. You can cast these spells even if you don't spend any snow mana to cast them; their additional effects simply won't do anything.
(2/5/2021)
The Kaldheim set doesn't have any cards with mana costs that include {S}, but some previous sets do. If an effect says such a spell costs
1
 less to cast, that reduction doesn't apply to any {S} costs. This is also true for activated abilities that include {S} in their activation costs and effects that reduce those costs.