Boommobile to become a creature until end of turn.
Activate
Deadeye Navigator by paying ({1} magic symbol) ({U} magic symbol) , blinking it.
When
Deadeye Navigator enters, its soulbond ability triggers, pairing it and
Boommobile.
Activate
Boommobile by paying ({1} magic symbol) ({U} magic symbol) , blinking it.
When
Boommobile enters, it triggers, adding ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) that can only be spent to activate abilities.