As for the sideboard, I would recommend being prepared for three things: problematic permanents, counterspells, and red spells
Invasion of Ikoria Invasion of Ikoria is a fantastic MTG Battle, because it's an excellent MTG Tutor card
Players are considered Illumineers, and according to the website, players will "wield six magical inks to summon glimmers of Disney characters." However, apart from the brief product description, there is little known about the rules
It is not an activated ability, its a keyword action
Showcase Scrolls of Middle-earth We're bringing the experience of reading your well-loved copy of The Lord of the Rings to Magic with the showcase Scrolls of Middle-earth treatment
Brainstorm, Impulse and Opt are the best of the bunch, but the others offer some redundancy and utility