every half hour ? thats so really bad luck , theres is people that play hours and dont get any attack event , and wolves attack only happens in mountains and plains biomes withouth a base so can be attacked everywhere there , but not in the meadows
fulings raid happen if u already defeat moder , if yagluth is defeated only will spawns fulings at night in the meadows but not their raid attack , and the mobs night spawn is part of the game progression