Promo cards are numbered #417-426
the casting cost is used when you play it from your hand, and the harmonize cost is used when you play it form the graveyard
If you use Terra as your commander, you have access to constant reanimation but only for creatures of a certain mana value (and Celes can only set up your graveyard)
Right away I wanted to formulate some way to build around them for this column, but got a little disheartened by how quickly people were finding a best build for each
If you're chasing cards from a new set, however, you can pick those cards while you're drafting, and they will automatically appear in your library
From there, you should have whatever you need to gorge yourself on lore and go all the way to victory