原文You remove the indestructible counter from Arwen as a cost to activate its second ability. If Arwen already received 2 damage earlier in the turn, it will be destroyed due to having lethal damage before you get to put a +1/+1 counter on it.
2023/06/16
原文If the target of Arwen's second ability is illegal as it tries to resolve, the ability does nothing. You won't get to put any counters on Arwen.