Knowledge Pool - The List (PLIST)Imprint When Knowledge Pool enters the battlefield, 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 Knowledge Pool without paying its mana cost.

See the pictures for an example the box has 5 out of 6 of them

silver golem

You may exile a blue card from your hand rather than pay this spell's mana cost

{5}: Shuffle your library

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager

you may have Valakut

you may mill five cards instead

Soul of the Wild's power and toughness are each equal to the number of lands you control

Its passage through history is marked by warped desires and insatiable greed

you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it

each opponent loses life equal to the life they lost this turn

Each opponent who can't loses 3 life