mtg cards like act of treason Half Treason, Half Control Magic : r/custommagic It gains haste until end of turn. Act of Treason - Jumpstart

As long as you have a Snake to sacrifice, you can bring this slithering Spirit out just before your turn begins, and untap into a world of doubled mana and activated abilities

Ancient Tomb is exactly what I think when I imagine a colorless land with a drawback

Anthem Achilles Davenport Freerunning (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.) Menace (This creature can't be blocked except by two or more creatures.) Other Assassins you control get +1/+1

It gets especially tricky when you remember that these cards have only the characteristics of their non-land side when they arent in play