APK MOD INFO
Name of Game: Clash of Assassins
VERSION: 1.4.0

Name of the cheat, mod, or hack (credits: wendgames):
-INCREASE SPEED ATTACK

Clash of Assassins MOD APK 1.4.0 (Increase Speed Attack)

Download the CACHE file/OBB file. They should be .zip or .rar files.
Extract the file to your sdcard.
Move the extracted folder to the location: /sdcard/Android/obb