Eren was done with killing eight more wolves the same way before he ran out of mana. He then ordered Reen to start her long-awaited feeding session after securing the bodies of his kills in his storage space.
Reen had used her deterrence as a demon beast to make the approaching wolf pack halt in its steps. Then she only allowed six more beasts to attack Eren in the pair of two so that he could practise his spells and battle style.
Eren had stopped using Blitzortung after its first time. The spell was taxing on his mana reserve. And he didn't have a ranking technique yet to recover from the state of lack of mana quickly.
Eren's clothes faced the burnt of the wolves' attack as a result. His chainmail armour could now be seen in the open. He had cuts and bruises on his skin due to the effects of wind blades and claw slashes aimed at him by the wolves.
Creation is hard, cheer me up!