This is especially useful on a battle because it can allow you to remove a blocker to let you attack the battle right away
Worldly Tutor For just 1 mana, Worldly Tutor sets up your next draw with the best creature available in your deck
Its also just difficult to interact with it completely dodges creature removal, and you cant Counterspell the ninjutsu ability, so the very moment you decide not to block a creature, Kaito, Bane of Nightmares hits the table, and its sticking around at least long enough to use a loyalty ability and pass the turn
Cards like Losheel, Clockwork Scholar, Krang, Utrom Warlord, and Steel Overseer reward you for filling your deck with artifact creatures or cards like Pinnacle Emissary that create artifact creature tokens
Used simply as a reanimation spell, Pre-War Formalwear is hard to beat