Delve doesn't actually reduce the cost of a spell; it just changes how you can pay the cost. The converted mana cost of the spell will remain whatever is printed in the top right corner no matter what!
Tag: Delve
You can’t respond to Tombstalker’s Delve ability
Delve is an ability that was (so far) only printed in Future Sight, and as such most players aren’t very familiar with it. Here’s the relevant rules text for “Delve”: “As an additional cost to cast this spell, you may exile any number of cards from your graveyard. Each card exiled this way reduces the […]