Ziran tests says:

ClickTest: Does the opposing force have...
6. at least 5 different team abilities?
7. at least 5 characters of 50 points or less?

this means if i have 4 figures 50 points or less or just 4 TAs on my team ziran dont gonna make damage?


Galactus

MY HERALD: As you reveal your force, you may also reveal another figure of 150 points or less to become your Herald. Then each opponent may choose a character on their force to offer up as Herald. You may then either accept an opponent's Herald, or choose your own revealed one. The chosen Herald is added to your force. Your chosen Herald possesses the Power Cosmic team ability, the Flight symbol, and modifies their combat values by +1. In addition, they can use a standard power as listed on the Herald dial. At the end of your turn, you may freely turn the Herald dial to any slot. (It can't be turned any other way.) When Galactus begins the 600 point dial you may return your Herald to your starting area on click #1.

The opponent is in the obligation to choose? or he can no choose?

If you only have 4 figures 50 points or less on your force, you will fail that test, and Ziran will deal you damage.
If you only have 4 different team abilties possessed by characters on your force, you will fail that test, and Ziran will deal you damage. Note: you do not need 5 figures with team abilities, you need 5 different team abilities. So characters with 2 printed team abilities are really helpful. And 5 characters all with the same team ability doesn't really help.


It is a may, so the opponent can choose to not offer up a herald. If the opponent chooses to offer up a herald, they get to choose which figure on their force is offered up.