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Amass was introduced in WAR but later changed to be more specific

Aetherdrift - Start Your Engines // Max Speed Best card: Mendicant Core, GuidelightMendicant Core, Guidelight Runner-up: Samut, the Driving ForceSamut, the Driving Force "Start your engines" grants the player its first point of speed, which will increase by one during said player's turn if an opponent loses life, but it will do so only once

There are enough merfolk to fill a deck with just that creature type, which is always important for fielding a strong deck based on a single creature type

Once it resolves, it stops being a spell and becomes an artifact permanent on the battlefield