Captain Rex Nebula, Brazen Dwarf, and Exchange of Words

Prerequisites

• Captain Rex Nebula on the battlefield
• Brazen Dwarf on the battlefield
• Exchange of Words in hand
• You control an additional creature with mana value 0 or mana value greater than 6
• That additional creature does not have summoning sickness
• An opponent cannot block and kill that additional creature
• available

Steps

1. Cast Exchange of Words by paying
2. Exchange of Words enters the battlefield, exchanging the text boxes of Brazen Dwarf and the creature with mana value 0 or mana value greater than 6
3. At the beginning of combat, Captain Rex Nebula triggers, making the creature that now has Brazen Dwarf's text box a Vehicle and giving it crew 2 and "Whenever this Vehicle deals damage, roll a six-sided die and sacrifice this Vehicle if the result is equal to its mana value" until end of turn
4. Activate the Vehicle's crew ability by tapping Captain Rex Nebula, making it a creature until end of turn
5. Declare the Vehicle as an attacker and deal combat damage with it
6. The Vehicle's ability from Captain Rex Nebula triggers, rolling a six-sided die with no chance of a result equal to the Vehicle's mana value
7. The Vehicle's ability from Brazen Dwarf triggers, dealing 1 damage to each opponent
8. Repeat from step 6

Results

• Infinite damage
• Infinite die rolls