In Onix, you aim to create Collections of 4 different Gems. Be clever, acquire more gems than your opponents and use their effects to snatch a few more.
The game is made up of 104 Gem cards. During the set up, each player places 4 face-up Gem cards in front of them, forming 4 starting Collections, then the remaining cards are shuffled and separated into 5 roughly equal-sized Draw Piles. The Piles are arranged face up in a circle in the center of the table.
The starting player takes their turn, following these steps in order:
Choose a visible Gem on the Draw Piles and retrieve one or more cards with that Gem.
Collect the retrieved Gems to create or expand your Collections.
Apply the effect related to the chosen Gem.
Validate completed Collections to accumulate cards in your Stock.
Once the player completes these steps, it’s the turn of the player to their left. Turns proceed in this clockwise manner until a certain number of Draw Piles are empty.
The winner is the one with the most cards in their Stock.