The second mechanic, Initiative, expands the dungeon delving mechanic that was core to Adventure in the Forgotten Realm
Ive had a Legacy Affinity deck on the side ever since my friend showed me how quickly you can kill someone with a turn-two Tezzeret, Agent of Bolas in that format
Red: Deflecting Swat, Bolt Bend , Wylls Reversal , Wild Ricochet, etc
Creatures with vigilance, on the other hand, don't have to tap when declared as attackers
With a creature capable of 10,000 fire-power, theres plenty of room to experiment with adding abilities like lifelink or trample to really maximize the value of each swing
The only expensive Adventure card financially, Brazen Borrower is a little worse in Commander than constructed