Lets break down the cards, the mechanics, and how I think this new set is shaping up
The two rules of thumb to base your instant decisions around are giving your opponent as little information as possible and playing instants in your opponent's end step
And the nature of Commander forces players to pack their decks with card draw, so Nekusar has no trouble dishing out huge amounts of damage

Accomplished Alchemist Animal Attendant Ant-Man's Army Arbor Adherent Armored Scrapgorger Awakened Skyclave Beastcaller Savant Biophagus Birchlore Rangers Birds of Paradise Bugenhagen, Wise Elder Centaur Nurturer Channeler Initiate Citanul Stalwart Dawnhart Rejuvenator Deathbloom Gardener Delighted Halfling Drover of the Mighty Dune Chanter Eccentric Arachnologist Elvish Harbinger Enduring Vitality Esika, God of the Tree Favored Fighter Frog Butler Galadriel, Gift-Giver Gemhide Sliver Gene Pollinator Gilded Goose Glittermonger Great Divide Guide Great Forest Druid Guy in the Chair Hardbristle Bandit Harvester Druid Honored Hierarch Humble Naturalist Ilysian Caryatid Intrepid Paleontologist Ixalli's Lorekeeper Jaspera Sentinel Jewel Thief Jewel-Eyed Cobra Joiner Adept Lifespring Druid Llanowar Envoy Llanowar Loamspeaker Loam Dryad Lotus Cobra Manaweft Sliver Molt Tender Nightshade Dryad Nissa, Resurgent Animist Nomadic Elf Oasis Ritualist Orochi Leafcaller Outcaster Trailblazer Overgrown Zealot Paradise Druid Poison Dart Frog Prize Pig Professional Wrestler Prosperous Innkeeper Quirion Explorer Quirion Sentinel Reclusive Taxidermist Regal Behemoth Rift Sower Rootrider Faun Rosethorn Acolyte Saruli Caretaker

Illustrated by Luca Zontini Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
Its two-for-one, which is great