The Balrog, Flame of Udûn

Whenever Gollum attacks, look at the top two cards of your library, put them back in any order, then choose land or nonland. An opponent guesses whether the top card of your library is the chosen kind. Reveal that card. If they guessed right, remove Gollum from combat. Otherwise, you draw a card and Gollum can't be blocked this turn.

Vigilance Whenever you cast a spell, creatures you control get +1/+0 until end of turn. Scry 1. When Gandalf dies, you may put it into its owner's library fifth from the top.

Whenever Frodo enters or attacks, you may attach target Equipment you control with mana value 2 or 3 to Frodo. During your turn, prevent all damage that would be dealt to Frodo.