A FREE hammer-driven reward event. You spend Hammers to smash four numbered eggs; smashing enough activates an egg for a big bonus. Hammer costs to activate: Princess Lucy 3, James Bowie 6, Isabella I 8, Minamoto no Yoshitsune 12. Activating all four auto-activates a fifth Caesar Egg. Each egg must be smashed at least twice, so all four needs a minimum (3+6+8+12)x2 = 58 hammers; ~70 usually suffices (luck-dependent). Hammers come from the normal hammer methods, so time hammer-earning to the event. Each smash randomly gives 4 of 5 items; activation + Caesar's egg fill the rest. Priority if short on hammers: Gems smash Minamoto (12), Stamina smash James Bowie (6), Arrest Warrant smash Isabella (8), Refining Stones smash James Bowie (6). F2P-viable. Total value when all eggs activated (minimum): ~106h general speedups plus training 196h/healing 84h/construction, research, crafting, trap 36h each; Food/Lumber 9.5M, Stone/Ore 6.5M boxes; Gem 10,800, Gold 5M, Chip 3,000; 100 Stamina x4, Adv City Teleporter x6, Arrest Warrant x6, Adv Troop March Speedup x4; Material Lv5 x38, Refining Stone x540, Runestone x15, Research Stone x32, Dragon Crystal x33, Magic Artwork Chest x135. Tip: break eggs early -- regen/4-hour timers can make you miss the window. For a bot, this is a major free source of gems, stamina, teleporters and artwork chests -- stockpile hammers and dump them here.
Original research source: Evony Guide Wiki