"Dragon Knight of Creation" Rating Score by とき

The effect of increasing the level by 4 during the opponent's turn, the effect of sending his Dragon of level 7 or 8 from the Deck to his GY when destroying the opponent's monster in battle, sending 1 card and himself to his GY, and of GY A card that has the effect of reviving a level 7 or 8 dragon.
The first effect is what it is, but it can trigger the negate effect of Ruins of the Divine Dragon Lords . However, it's a shame that this card only synergizes with Ruins of the Divine Dragon Lords through this effect. This card itself is also fragile, so should I consider it as a filler for preparing the highest grade dragon?
The remaining effects are his GY fertilization and resurrection of the highest grade dragon, but the GY fertilization is an element that is already difficult to aim for destroying in battle with a low-ranking attacker. In the first place, since Orobu, Mausoleum, and Dark Dragon also have End and Grepher, the need to use this card is subtle. Resurrection is the same, and it is quite suspicious to aim for resurrection by spending summoning right and hand cost on this card in the presence of a powerful card called Return of the Dragon Lords.
I understand wanting to help the top dragon, but I feel like he can do the same with Spell Trap, so I wanted something else.