Both of this cards effects work well for "Qli" Decks.
The Level 4 or lower Normal Summoned monsters effect include all your Normal Summon without Tribute "Qli" monsters. This reverts their attack to normal and after the End Phase allows their protection effect to still work.
The Level 5 or higher Special Summoned monsters effect does not include your "Qli" monsters as they revert to level 4 by their own effects. As such they are not banished by this card when they leave the field and can still function as Pendulum monsters.