Essence Maze

Link — If a spell would resolve, if it shares a
color with the last spell cast this turn, counter
that spell instead unless that player pays {x},
where X is the number of colors that spell is.
{u}, Tap another colored permanent: Target spell becomes the color of your choice until it resolves.
When you decide to take one of its paths, the maze
creates a new one and displace you on its way.