They can be solved fairly easily, and, unless combined with the other half of their combos (proliferation of counters, Mycosynth Lattice, Wheel of Fortune), dont have a huge impact on the game for more than a couple of turns
Anytime an opponent casts a spell with mana value equal to the number you pick, or they cast a creature with either power or toughness equal to the number you picked, that player loses two life and you get to draw a card
As the ink pours from the Great Illuminary, treasured lore goes with itincluding the powerful trident of Disneys King Triton
Outside of this, a card like Finders Keepers with its staggering three-card draw may find a place in some competitive decks
Creatures that work well with this artifact include Griselbrand / Emrakul, the Aeons Torn / and Jodah, the Unifier