Emeria Shepherd | Wormfang Newt | Goblin Bombardment

Cards

Activate
Goblin Bombardment by sacrificing
Wormfang Newt.
When
Wormfang Newt dies, its second ability triggers, returning a Plains from exile to the battlefield.
When the Plains enters the battlefield,
Emeria Shepherd triggers.
Holding priority, activate the Plains by tapping it, adding ({W} magic symbol) .
Resolve the
Emeria Shepherd trigger, returning
Wormfang Newt from your graveyard to the battlefield.
When
Wormfang Newt enters the battlefield, its first ability triggers, exiling a Plains.
Resolve the
Goblin Bombardment ability from step 1, dealing 1 damage to any target.
Repeat.