Because delve isn't an alternative cost, it can be used in conjunction with alternative costs, such as flashback. It can also be used to pay for additional costs that include generic mana.
MTG · Card
◇ Catalog #51
Logic Knot
mma·#51·common·nonfoil
Illus. Glen Angus
—
in vault
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for trade
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wishlisted
Jun '13
13 yr ago
Value
$0.32+$0 (+3.2%)
30 days high $0.32 · low $0.29
Volatility · moderate
EUR€0.23USD$0.32TIX0.03 tix
Where to buy / sell
Search links · prices vary by venue
Buy this card
Played in EDH
EDHrec rank #12,377 · Fringe play
Variants
Gameplay
Instant
Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Counter target spell unless its controller pays {X}.
Legalities
tlrlegal
duellegal
brawlnot legal
pennynot legal
PreDH
Rulings · 4
wotc
wotc
To cast Logic Knot, you choose a value for X, determine the total cost, then pay the total cost with some combination of mana and exiling cards.
wotc
Delve doesn't change a spell's mana cost or mana value. For example, Treasure Cruise's mana value is 8 even if you exiled three cards to cast it.
Notes
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Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Glen Angus
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
