Zombryo will turn a random number of chickens into make-shift zombies so
they can ooze away (2 instances per game).
Click on Zombryo to activate, then click on a chicken on the game board.
A contagion quickly spreads as birds turn to zombies and disappear (but
don’t worry, the disease is only temporary).
Tip: Using Zombryo is more effective when the board is crowded.