Alan
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1. English "R".
2. "K" (definitely in Tribes of the East, but I think it was also added to 1.6).
3. A detailed answer has already been given.
4. Space or "D" (it seems like the shield is somewhere on the right-bottom in battle). It cannot be frozen.
Тьма - это то, что позволяет смертным не забывать, как ярок бывает свет.