I am sharing here my version of Sierra ouroboros cycle - featuring the hive and the nilam.

The goal of this deck is to cycle through with ouroboros and support effect, to get the most efficient card every turn. While doing so, you can put counters on your icebound hollow.

This decks aims to play for tempo, and you should not think that it is "just a hive deck". You need to play for expedition as much as possible while keeping your CA, in other terms you should not forget to play altered.

That is where the Nilam come into play. It is your best day2 play, since it can exhaust your opponent while creating 4/4/4 stats. This will really help you get to the hive later, while creating CA. Playing the nilam is a good play on its own, but any additionnal 2/2/2 your are going to get is very good. You can use frozen delivery to proc the nilam, or just your support effect on the nilam to exhaust your opponent.

A big mistake is to cycle without reason. If you start cycling, it must be for one of the following reason : 1. You are looking for a specific card to play 2. You want to put counters on icebound hollow.

Otherwise, you should not fall into the trap of cycling for nothing, cause that will make it more likely for you to brick or to miss a card when you really need one.

Finally, if you managed to fight for expeditions while preserving CA, you can finish the game with the hive that you are very likely to have on 6 mana, even with only 2 copies since your cycle so much.

The deck is very fun and technique to play, so enjoy !