Each set includes two Commander precon decks built around a tribal creature theme
Thankfully Draftsim has a ton of resources to help you
Not only do you get to choose one of two cards to add, but the other card will go to your graveyard, which can eventually be cast using Gales ability
Heralds Horn is also a standout, given the high density of Tyranid creatures to be found in the deck
Any strategy that puts cards into your graveyard , whether that be mill, dredge, delve, discard, or even directly placing cards into your graveyard with the intent of playing them later, will benefit from having cards with flashback
You can have a good record with a Historic aggressive creature deck, or a mono-red burn deck in Timeless, because these decks dont rely that much on Timeless-only cards, but the competition will be fiercer, and Timeless is home to many broken combos as well