Captain Rex Nebula | Brazen Dwarf | Exchange of Words

Cards

Exchange of Words in hand.
Captain Rex Nebula and
Brazen Dwarf on the battlefield.
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.
({1} magic symbol) ({U} magic symbol) ({U} magic symbol) available.

Cast
Exchange of Words by paying ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) .
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.
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.
Activate the Vehicle's crew ability by tapping
Captain Rex Nebula, making it a creature until end of turn.
Declare the Vehicle as an attacker and deal combat damage with it.
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.
The Vehicle's ability from
Brazen Dwarf triggers, dealing 1 damage to each opponent.
Repeat from step 6.