Oversized card, not tournament legal.

Undercity

Secret Entrance:

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Forge:

Put two +1/+1 counters on target creature.

Lost Well:

Scry 2.

Trap!:

Target player loses 5 life.

Arena:

Goad target creature.

Stash:

Create a Treasure token.

Archives

Draw a card.

Catacombs:

Create a 4/1 black Skeleton creature token with menace.

Throne of the Dead Three:

Reveal the top ten cards of your library. Put a creature card from among them onto the battlefield with three +1/+1 counters on it. It gains hexproof until your next turn.