mtg tutor card Enlightened Shuffle your library Worldly Tutor MTG - Commander

Most other decks have haste creatures, flash creatures, or large numbers of small creatures, and those arent what Tamiyo wants to play against

One mana to get +3/+3 to your zombie team is incredibly efficient

The creature chosen to be sacrificed is still on the battlefield up through the time that you activate mana abilities

On the other hand, Nightveil Specter can steal lands, which is a nice upside, but because it was printed nearly a decade ago, it doesn't fix our mana for the cards it steals (it's our only theft card that doesn't), so we either need to hope that our opponent is playing blue and black cards that we can cast with our mana base or hope that we can use Nightveil Specter to steal some lands of the proper color before moving on to casting nonland cards

As such, this list will be focused on cards that can be cast at instant speed