From The Depths
Mod Overview
This modification provides a unique system for summoning bosses and monsters in the Minecraft world. The core functionality is activated through a special block - the Altar of Summoning, which is used together with the Totem of Summoning to create epic battles with any creatures from the game or other mods.
Main Features
Summoning System
The Altar of Summoning is the central element of the mod. When using Totems of Summoning on the altar, a large-scale event occurs with four lightning strikes, after which the main boss appears on the fifth. The system also supports periodic summoning of additional monsters after the main enemy appears.
Flexible Configuration
The mod is designed primarily for modpack creators, providing extensive configuration options. Developers can set various restrictions for totems, defining the conditions for their use. All configuration files are fully customizable to suit the needs of a specific modpack.

Crafting recipe:

Items
Totem of Summoning
Each totem contains information about a specific monster. To activate, simply take the totem in hand and use it on the Altar of Summoning to summon the corresponding creature and its minions for battle.

Technical Features
Version 1.3.0.0 significantly expanded functionality for modpack developers by adding a system of restrictions for totems. Totem crafting recipes require specifying a specific spawn key in the format: "from_thedepths:totem|SPAWN_KEY|".
Compatibility
The mod supports summoning creatures from any installed modifications. By default, the mod adds only basic blocks and items - all main functionality is configured by the modpack developer through configuration files.