Thopters you control have haste.
Whenever you play a land from exile or cast a spell from exile, create a 1/1 colorless Thopter artifact creature token with flying.
Once a Thopter that came under your control this turn has legally attacked, causing it to lose haste by removing Pia Nalaar won't remove that Thopter from combat. It will just keep attacking. Good Thopter.