mtg amonkhet commander deck Booster Pack FeaturesConfiguration 10 Amonkeht Booster Packs 1 Card Box 1 Players Guide with complete visual encyclopedia for Amonkhet 80 Basic Land Cards 1 Magic Learn Mtg Planeswalker Green Ultra Pro

This might make them gun for you first, or just try and get on your good side

Lonis, Cryptozoologist One of Magic's best investigate cards and a fairly swingy Clue commander, Lonis, Cryptozoologist makes lots of rectangles, which is very nice in modern Magic

This Planeswalker can give them all double strike and vigilance, meaning a big, game-ending swing

Combo decks in these formats have traditionally avoided tutors in favor of cantripping or looting through their cards quickly, but that may be worth rethinking for black-based lists like Yawgmoth Toolbox

This is nice too, because one of the things it looks like treasure decks will want is mana sinks, and Forsworn Paladin is nice there as well