Chances are, dropping either one of these early will delay the Zenith player a few turns, which should be all you need to win
Worldspine Wurm Worldspine Wurm is a whopping 15/15 for 11 mana with trample that splits into three 5/5 tramplers when it dies
Swarm Intelligence is a seven mana Enchantment that lets you copy any Instant or Sorcery spells you cast
For my purposes, any non-land effect that increases your available mana for the turn after you resolve it counts, and Grim Monolith certainly does that
every Collector Booster contains 7 alt-frame cards, including the possibility of Retro-Frame, Borderless Profile, Borderless Frame Break, Borderless Concept Eldrazi, and Borderless
With enough mana, a player can just control the rest of the game, and theres no worse way to lose than to yourself