This battle is one of those where the Modifiers just give you so much freedom and power at the same time. Shapeshift Happens Modifier lets every units act like they belong to all Bloodlines which is already crazy. This means you can use any single available unit for that battle which can be overwhelming but also as fun since you can do combos you normally cannot do. Then Born Again Modifier adds another layer because every units gets revived once which makes fights longer and more chaotic. Because of these two Modifier, damage and scaling becomes very important and some units can get really out of control if left alone. It becomes less about strict team rules and more about how strong your combo can get as the rounds go on.

Battle:

https://splinterlands.com/battle/sl_f03cde92d9e62fe732e618d86b1b8fda

In this battle, we have two modifiers to play around. Shapeshift Happens modifier unlocks the use of all units as long as you use an archon with Bloodline Dominion ability. Since all units have all the Bloodlines, they also benefit from your Archon's Bloodline Dominion ability. The second modifier is Born Again modifier allowing units to get revived once when they die. These two modifiers are very useful to me and it helped me create a very scary team that is not relying on Mundane Beast and Avian bloodlines. With the high damage units that I was able to pull from Fire element, this helped me win easily in the battle. Scavenger ability from Endless Ape also had a feast. Since units get revived after they get killed, Endless Ape was able to get double the stack for this battle.

Modifier 1: Shapeshift Happens: All units have Shapeshift (treated as all bloodlines).

Modifier 2: Born Again: All Units have the Rebirth ability.

My Lineup:

Because of Shapeshift Happens Modifier, I was able to get units I wanted from any other element. This lineup is very heavy on the damage and while I didn't use a lot of Mundane Beast and Avian units, its fine because the benefit that Elowen Sylphie gives is just Charge ability that allows melee units to attack from any position. It's not a deal breaker not to have this ability if the unit is not a melee units.

Elowen Sylphie: Elowen Sylphie has Bloodline Dominion giving Avian and Mundane Beast the Charge ability. This also allows Elowen Sylphie to use units with Avian and Mundane Beast ability from other elements. Since there's Shapeshift Happens modifier, this applies to all units. Elowen Sylphie's second ability is Summoner Tactics giving Resurgence and Trample to up to 2 units.

Drifting Manatee: Drifting Manatee is used as a simple front unit to absorb damage early in the battle. It does not deal damage but its decent armor and health helps delay the enemy attacks on top of the low 3 mana cost. The Dodge ability also gives it a chance to avoid hits which can be very useful especially against melee and range units. With Born Again Modifier, even if it dies early it still comes back once which adds more time for my damage units to work. It is not overpowered but it does its job well as a temporary wall.

Lioceros: Lioceros is a strong melee unit with good stats and Thorns ability. Even without Shapeshift Happens Modifier, since it has a Mundane Beast modifier, it gains Charge so it can attack from the back which makes positioning easier. Thorns is also very useful because enemy melee units will take damage when they attack him. With Born Again Modifier, Lioceros can come back once and continue dealing damage or reflecting damage through Thorns. It is a solid unit that adds both offense and defense to the team.

Esper Shadowbeak: Esper Shadowbeak is one of the main damage units in this lineup because of its mixed attacks. It has both magic and melee damage which makes it very flexible in different situations. I gave it Resurgence and Trample so it can revive with full stats and possibly chain attacks after killing a unit. It has Avian Bloodline so, it can also use its melee attack from any position from Elowen Sylphie's Charge. This makes it very dangerous especially if it survives long enough to use all its abilities.

Forlorn Geomant: Forlorn Geomant is a pure damage unit with very high magic damage. Even though it has no abilities, the 5 magic damage is already enough to make it a threat. With Born Again Modifier, it can come back again when it dies which allows him to attack again with its high damage. It is expensive in terms of mana costing you 13 mana but worth it because of the strong damage output.

Ballista's Deadshot: Ballista's Deadshot is another high damage unit with magic attack. Scattershot makes its attacks random which can sometimes hit important enemy units unexpectedly. Dispel is also useful to remove buffs from enemies which can reduce their advantage. With Born Again Modifier, it gets another chance to attack after dying which is very helpful. Even with lower health, its damage makes it a valuable part of the team. Like Forlorn Geomant, it costs 13 mana. I was able to use this unit because of Shapeshift Happens modifier which is nice.

Endless Ape: Endless Ape is one of the strongest units in this battle because of Scavenger ability. Every time a unit dies it gains more health which makes it stronger as the battle goes on. With Born Again Modifier, every unit dies twice which means double stacks for Scavenger making him very hard to kill later. I also gave it Resurgence and Trample so it can revive again with full health and armor along with the Scavenger stacks and deal more damage. With Charge from being Mundane Beast, it can attack from any position which makes it even more flexible and dangerous.

This battle is just fun. The two modifier that benefits my build the most is in this battle which was crazy. This doesn't happen a lot but when it does, this is how your creativity and knowledge on the game truly shines.