Its led by Daretti, Scrap Savant with the help of the all-new Feldon of the Third Path and reprinted Bosh, Iron Golem
Helix Pinnacle's triggered ability has an "intervening 'if' clause." That means (1) the ability won't trigger at all unless Helix Pinnacle already has 100 or more tower counters on it as your upkeep begins, and (2) the ability will do nothing if Helix Pinnacle has lost enough counters such that it has fewer than 100 counters on it when the ability resolves
Kotis, the Fangkeeper Kotis, the Fangkeeper is a very interesting card to build around, especially with Dragonfire Blade around
Starn has a static ability that reads "Whenever another source you control deals exactly 1 damage to a permanent or player, Ghyrson Starn, Kelermorph deals 2 damage to that permanent or player"
Your key cards fit into an archetype, so build the type of deck that suits them best