5D-Breakthrough Defender

The Ruinous Powers hold millennia spamming rivalries. These ancient jealousies prevent the Gods from working in harmony. An army must choose a general, either a Great Daemon, or in the absence of a single Herald, to lead. An army led by a Daemon of Khorne cannot include any Daemons of Slaanesh; likewise an army lead by a Daemon of Slaanesh cannot have any Khornate daemons. An army led by a Daemon of Tzeentch cannot contain any Daemons of Nurgle; likewise an army led by a Daemon of Nurgle cannot have any Tzeentch daemons. Additionally, an army cannot include more than 3 daemon units from each of the two Gods the general is not devoted to. For example, an army led by a Keeper of Secrets can have any number of Slaanesh daemons, a maximum of 3 Nurgle daemons, a maximum of 3 Tzeentch daemons, and no Khorne daemons. Note that any independent character daemons cannot join daemonic units of other Gods.

Any unit with the Summoned special rule will be able to be summoned onto the battlefield with the following restriction. The Daemon of Chaos army must start the game with at least half of its units (rounding up) deployed on the table unless the mission allows fewer. All other eligible daemon units will start in reserve irrespective of whether the Reserves special rule is used in the mission being played.
Starting with the second game turn roll a D6 for each Daemonic unit held in reserve at the start of the Daemon of Chaos player’s turn. If you roll greater than the number required, the unit becomes available. On the 2nd turn a 4+ is required, on the 3rd turn a 3+ is required, and on all other turns a 2+ is required.
When a daemon unit becomes available place the large Ordnance blast template in base contact with a model carrying a Chaos Icon. Roll the scatter dice and 2D6. On a ‘Hit’ the template is not moved, otherwise move the template a number of inches equal to the result on the 2D6 in the direction of the arrow. The daemon units are then deployed on the area covered by the template. When placing the models, any that cannot be places such that they are partially touching the template or are more than 1” from an enemy model are destroyed. Once they have arrived, the daemon unit can move, assault, and shoot as normal.
Note that unlike a Chaos Space Marine Army Great Daemons are not summoned onto the battlefield.