Cards like Saruman, the White Hand, Sauron, Lord of the Rings, Corsairs of Umbar, and your many other spells with Amass effects will contribute to making your orc army massive
Ideally, these outlets allow you to discard at instant speed and for little mana, since you still need to be able to pay your madness costs on top of activating them
Doubling Season Showcase (Fracture Foil) Introduced back in 2005 in the Ravnica: City of Guilds set, Doubling Season has gotten the reprint treatment in MTG Foundations
Like all of our Premium effects, this will appear both in Collection and inside the Duel Scene when your Foil Animation settings are enabled
I'm thinking Narset, Enlightened Master in an extra turns deck, for example