msem-instigator

Reveal up to four cards you own from outside the game with the same name, then shuffle them into your main library.
Draw a card.

Changeling (This card is every creature type.)
{T}: Add {C}.

Counter target spell unless its controller pays {2}.
Wanderlust — If that spell has mana value 2 or less and you control four or more differently named lands, counter that spell.

When Possibility Engine enters, exile the top two cards of your library.
Wanderlust — During each of your turns, if you control four or more differently named lands, you may play a card exiled with Possibility Engine.

Creatures with power equal to the number of cards in your hand can't attack.

{T}: Add one mana of any color. Spend this mana only to cast a multicolored spell.

({T}: Add {R} or {G}.)
Practice Range enters tapped unless you control two or more basic lands.

First strike
Whenever a nontoken creature you control leaves the battlefield, you may pay {W}. If you do, create a 1/1 colorless Spirit creature token.

Precursor Sanctum enters tapped. When it does, look at the top three cards of your library, exile one face down, then put the rest on the bottom of your library in any order.
{T}: Add {C}.
{4}, {T}: You may play the exiled card without paying its mana cost. Activate only as a sorcery.