How can you create a combo with Gisa and Geralf, Sidisi, Undead Vizier, Beacon of Tomorrows?
user
[START OF COMBO]This combo can be formed with Gisa and Geralf, Sidisi, Undead Vizier, Beacon of Tomorrows

Color identity: UB
Mana cost: {9}{U}{U}{B}{B} each turn
Steps:
  1. Cast Sidisi from your graveyard by paying {3}{B}{B}.
  2. When Sidisi enters the battlefield, its exploit ability triggers, causing you to sacrifice Sidisi.
  3. Sidisi's second ability triggers, causing you to search your library for Beacon of Tomorrows and put it into your hand.
  4. Cast Beacon of Tomorrows by paying {6}{U}{U}, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
  5. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Gisa and Geralf must be on the battlefield
  - Sidisi, Undead Vizier must be in the graveyard
  - Beacon of Tomorrows must be in the library
  - You have not cast a creature spell using Gisa and Geralf this turn.
[END OF COMBO PREREQUISITES]
assistant