Okay, so:
- Weather does not stack. For example, if you play Fog on a row affected by Rain, Fog overwrites it (Rain disappears and Fog stays).
- If multiple cards have the same lowest/highest strength, they are all damaged.
- First Light has only one change – it will affect only one chosen row, just like the other weather cards.
- Weather damages units permanently. Removing the weather from a row does not restore any strength.
- Once a unit is reduced to 0 strength, it will be sent to graveyard.