- If a land already has Invaders participating in Ravage, the new Invaders will also participate in that Ravage. Depending on how well the land is Defended and how many Dahan are present, this could be good (more Invaders destroyed in the counterattack) or bad (the Ravage now adds Blight from the extra Damage). You can resolve the two Ravages in whichever order is more advantageous.
- If there's another Ravage Card this turn, that card can now cause Ravages in any matching lands that are no longer empty.
This applies both to lands that "naturally" match the Ravage Card (e.g., a Jungle when the Ravage Card is Sands+Jungles) and to lands that match the Ravage Card due to an extra effect (e.g., lands with 3+ Explorers against the Tsardom of Russia Level 3+). Thus, for instance, against the Tsardom of Russia level 3+, if a Ravage pushes an Explorer by the Level 2 effect A Sense for Impending Disaster, it will not cause a Ravage to happen by the Level 3 effect Competition Among Hunters from the same card, but can cause a Ravage from a following Ravage Card added by the Level 5 effect Entrench in the Face of Fear.