Theres a lot of glue here in the colorless cards, and more, if you consider some of the prototype or unearth cards that you are okay playing without their color like Scrapwork Mutt without unearth, is still a perfectly fine creature
There are wholesome ways to use Helm of the Host like copying a Nadaar, Selfless Paladin to help venture through a dungeon quicker but it's also a potent combo tool
Obelisk of Urd Obelisk of Urd gives your creatures a hefty +2/+2 bonus, so thats a double anthem already
For card value and singles decisions, read The Value of Magic: The Gathering Cards
This is a deck whose sum is greater than its parts, each piece combining to make some truly fearsome threats
Tymna the Weaver takes that even further with additional card draw, up to three extra cards per turn