Theres space for more cards that have a perk for winning (see Skyshroud Ambush), but fighting still plays well with other strategies
However, they do typically contain several very strong cards, and these cards can then be used to upgrade your deck later
These lands can enter untapped if you pay 2 life, providing incredible mana flexibility
Kaust is one of the best niche-mechanic commanders Ive seen in a while
The flavor's definitely there in some capacity, just ignore the logistics of how the concept of True Identity can exist as a disguised creature on the battlefield
This can include cards that arent otherwise in a set or format, with a few examples of this in the gallery above being Ponder, Stormfront Pegasus, and Tropical Island (none of which are collectible in Historic Horizons on their own)