Mimir, Smartest Man Alive

You may look at the top card of your library any
time.

As long as Mimir is attached to a creature, you may
play lands and cast spells from the top of your
library.

Reconfigure {2}{u} ({2}{u}: Attach to target
creature you control; or unattach from a creature.
Reconfigure only as a sorcery. While attached, this
isn't a creature.)