Tribute To The Doomed Trick:

If you don't have any cards in your hand to discard, Tribute to the Doomed will still work. A good combo is Monster Reborn+Tribute to the Doomed. Discard 1 strong monster card from yor hand, destroy 1 monster and return the discarded monster (or the destroyed monster, if you don't have strong monster cards in your hand) with Monster Reborn.