Transforming it into Ayara, Furnace Queen turns your commander from a sacrifice outlet to a sacrifice fodder engine that can end the game
Just make sure you pack your deck with discard pieces so youll have plenty of food for this oozey menace
In addition, she also packs a scaling bushido ability that makes her more powerful the more creatures are attacking, which discourages your opponents from aiming their mandatory attacks at you
To balance out creatures becoming more powerful, MTG has also introduced more effective removal spells over the years, like destroy spells, abilities to give creatures -X/-X counters, and the most powerful of all: Exile
While individual differences in children are very large, I think children as young as early four years old could play it
It's an indestructible enchantment which is very difficult to kill, it hits all enemies equally, and it's super easy to build around