Miltank's gradually increasing DMG may not one-shot the opponent, giving them time to retreat to a high-HP card
The con is that you have to spend your hard-earned money
These are usually found in the Metal type and, to a lesser degree, the Fighting type
Aether Revolt Prerelease Pack $64.99 US Shipping Only Due to export restrictions, this item may only be shipped to addresses in the United States, APO/FPO addresses, and Puerto Rico
Beyond just being powerful on its own, Insight Engine also works wonders with any Proliferate or counter-doubling effect
Inspired by Double Masters , I created a Riku of Two Reflections Commander deck with a doubling theme