@Killfang96 @RyouguBoth Guardians look good to me, but I feel like I need to stress a couple of kinda important aspect of Guardian Summoning:
It's mandatory, as in, if you CAN summon it, you MUST summon it.
As a result, it'd make things easier to understand if the Guardian's summoning requirements pertained to a specific game state, such as having at least a certain number of monsters on the field and, depending on the level and/or effect, an additional summoning cost, such as tributing an amount of those monsters dependent on either their combined total levels or just a set amount to tribute.
Hope that makes sense.