Cephalid Coliseum - [Foil] From the Vault: Realms (V12) KLD then discard three cards

then discard three cards

they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost

I know my soul will rise to Starnheim

or even the rituals of Titania's court

you may play a land from your graveyard or cast a permanent spell with mana value 3 or less from your graveyard

Cephalid Coliseum - [Foil] From the Vault: Realms (V12) KLD then discard three cards{T}: Add {U}. Cephalid Coliseum deals 1 damage to you. Threshold {U}, {T}, Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.