Some tiles give you additional effects: Either once when you play them, in which case the effect is marked with a lightning bolt and highlighted in light yellow (5); or ongoing, in which case it is marked with an infinity sign and highlighted in light green (6).

IMPORTANT: If you play a tile with an ongoing effect, it is immediately active. If the effect relates to an icon that is present on the currently played tile itself, it is triggered immediately.

This applies, for example, to the Herpetologist tile shown above: The effect applies to tiles with a reptile icon and the Herpetologist itself has such an icon.