1) When I reveal Forced March and my opponent kneels a character, can I kneel my Ygritte to initiate the effect again?
Ygritte cannot be knelt by card effects, but Forced March says "kneel to initiate", which means kneeling is a cost. Yet it is not a cost paid in step 4 "Pay Costs", rather it is part of Step 7 "Resolve effects". So, is kneeling here a cost, an effect, or both?
2) When I reveal Forced March to my opponent's Valar Morghulis, and my opponent kneels his only character with a military icon, can I kneel my Ser Barristan Selmy (the Baratheon one) to initiate the effect again, even though my opponent will have no more eligile characters to kneel? I want Selmy knelt in order to save someone from Valar.
RRG "Abilities" says: "A card ability can only be initiated if its effect has the potential to change the game state." However, I am not initiating an ability here, only its effects. Ability initiates in step 1, effects initiate in step 6. Does any other rule prevent me from initiating the effect?
When Revealed: Each opponent kneels 1 character he or she controls with a military icon. Then, you may kneel a character with a military icon to initiate this effect again.