Complex sentence: This chance is increased by the use of meat items which lower a monsters wildness, although its not always a guarantee, the more the player uses, the lower the monsters wildness will be and the more likely it is to join.
Split into simpler sentences: This chance is increased (though not guaranteed) by the use of meat items which lower a monster's wildness. The more the player uses, the lower the monster's wildness will be and the more likely it is to join.