Charismatic Conqueror, The Twelfth Doctor, and Aang, Swift Savior // Aang and La, Ocean's Fury

Prerequisites

• Charismatic Conqueror on the battlefield
• The Twelfth Doctor on the battlefield
• Aang, Swift Savior // Aang and La, Ocean's Fury in hand
• available

Steps

1. Cast Aang, Swift Savior // Aang and La, Ocean's Fury by paying its mana cost
2. When Aang, Swift Savior // Aang and La, Ocean's Fury enters, it triggers, exiling Charismatic Conqueror
3. Cast Charismatic Conqueror from exile by paying
4. Charismatic Conqueror's demonstrate ability triggers, causing you and an opponent to copy it
5. Resolve the opponent's copy of Charismatic Conqueror, and then resolve your copy of Charismatic Conqueror
6. When your Charismatic Conqueror token enters the battlefield, the opponent's Charismatic Conqueror triggers, causing you to tap your Charismatic Conqueror token
7. Resolve the original Charismatic Conqueror spell
8. When the nontoken Charismatic Conqueror enters the battlefield, the opponent's Charismatic Conqueror triggers, causing you to not tap the nontoken Charismatic Conqueror, and causing the opponent to create a 1/1 Vampire creature token
9. When the opponent's Vampire token enters the battlefield, both Charismatic Conquerors you control trigger, causing you to create at least one 1/1 Vampire creature token
10. When your Vampire token enters the battlefield, the opponent's Charismatic Conqueror triggers, causing you to not tap the Vampire token, and causing the opponent to create a 1/1 Vampire creature token
11. Repeat from step 9

Results

• Infinite ETB
• Infinite creature tokens
• Infinite ETB for target opponent
• Infinite creature tokens for target opponent