Knowledge Pool vs Sol Ring
| Mana cost | ||
|---|---|---|
| Mana value | 6 | 1 |
| Type | Artifact | Artifact |
| Rarity | rare | uncommon |
| Prices | $1.13 | $4.77 |
| Rules text | Imprint — When this artifact enters, each player exiles the top three cards of their library. Whenever a player casts a spell from their hand, that player exiles it. If the player does, they may cast a spell from among other cards exiled with this artifact without paying its mana cost. | : Add . |