Widow

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

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

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