Pick a tower card (or hotkey) and click your board. Shift-drag builds a whole line. You can never fully block the path.

Creeps walk from the glowing portal at the top to the crevasse at the bottom. Longer mazes mean more shots.

Click a tower for its card: upgrade (G) through four tiers, or sell (Del) for 70% back.

After the 30s build phase, open your Summoning Palace (P) and send creeps into the enemy lane straight across from yours (if it's empty, they go to the weakest enemy lane). Every send raises your income, paid every 10s: part right away, the rest as the creep fights its way through (all of it if it leaks). Each creep has limited stock that refills over time, so mix your sends; the War Camp at the Upgrade Sanctum holds more. Income gains shrink as your income grows.

Palace I (1,000g) and Palace II (5,000g) unlock whole new creep sets with more HP, armour and income. Palace III (500,000g) unlocks the Infernal Drake: a 500,000g flying giant that pays no income but takes 10 lives if it gets through. It's the late-game finisher.

Your legion shares 150 lives. Every creep that leaks through any of your team's three lanes costs the team a life (tier 3 creeps cost 2). The first legion to run out loses. Help a struggling teammate with /give name amount in chat, and talk tactics with /t message (team only).