Tier 5?

'Right, it was like that, and that. Yes, combining the previous Tiers, it is almost like a combination of them all...' After a few minutes, Eldrian felt like he had managed to recall the module and its first two derivations, though he wasn't planning on using the derivations. 

Naturally, with his research, he had also glanced a bit at higher Tier spells. But with everything that was going on Eldrian hadn't focused much on this. It was why he felt he just needed some time to practice and he would make some massive strides. 

'Okay, so, I've got the module. Now the mana.' Thanks to all the practice over the past few months, Eldrian had massively improved his mana control. He fed it slowly to the spell module, which at first rejected the offered mana. 

Eldrian then quickly altered the combination of water and darkness, slowly finding that something else was missing too. So he added some wind mana and also a speck of ether in the end. 

'Oh, that did it?'