Rastakhan's Rumble Guide
Discover a copy of a card in your deck. Repeat this 2 more times.
-Witchwood Monster Hunt-
If you're using Toki, this card has an interesting interaction with the Double Time passive. Once you discover the three cards from Brass Lantern, your hand then fills with 3 completely random copies of cards from your deck. If you can get this treasure on your first draw, you can potentially have a hand of NINE cards in your first turn. This can help keep pace with the final boss, Infinite Toki, as it lets you have a veritable arsenal in your hand at turn 1 to help counter her cheap tactics.