Steel characters, such as Anna True-Hearted, keep your quests safe with high resilience, while items like Imperial Bow give a significant combat advantage, granting keywords like Challenger and Evasive to tip fights in your favor
It's a deck that I've been wanting to play at a large event for some time but I just never committed to registering until now
Mystic Sanctuary comes into play tapped unless you control three or more other Islands, which can be kind of steep but comes with a strong ability in return
Depending on build, that payoff can be combat-focused (for example Craterhoof Behemoth/Finale of Devastation) or spell-chain focused.
The same holds true against other creatures that can achieve a high toughness like Ledger Shredder, Murktide Regent, Tarmogoyf, Construct tokens and the like
Pre-War Formalwear is a staple of Legacy Death and Taxes decks as a way to keep your creatures around since the majority of the deck are creatures with a mana value of three or less