Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly name a card. You may turn this conspiracy face up at any time and reveal the chosen name.)
Spells with the chosen name you cast cost less to cast.

: Add .
Disguise
When this land is turned face up, add two mana of any one color. Until end of turn, you don't lose this mana as steps and phases end.

: Add .

As this land enters, you may pay 2 life. If you don't, it enters tapped.

This land enters tapped.
: Add .
, , Sacrifice this land: Put a +1/+1 counter on each of up to two target creatures you control. They gain vigilance and lifelink until end of turn. Activate only as a sorcery.

: Add .

This land enters tapped.
When this land enters, it deals 1 damage to target opponent.
: Add or .

When this land enters, sacrifice it. When you do, search your library for a basic Forest, Plains, or Island card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

: Add .
: Add one mana of any color. Spend this mana only to cast an Assassin spell or a spell that has freerunning, or to activate an ability of an Assassin source.

: Add .
: Add or . This land deals 1 damage to you.

: Add .
: Add one mana of any color. Spend this mana only to cast a Mount spell.
, : Look at the top card of your library. If it's a Mount card, you may reveal it and put it into your hand. If you don't put it into your hand, you may put it on the bottom of your library.