You can combine this with other effects to make the benefit to yourself even greater, but even just having this out and nothing else is going to give you a huge advantage over everyone else
Not considered a real Magic card, tokens are created by various effects that get you a permanent card that doesnt remain once it leaves the battlefield
One key reason why Fabled will feature so many reprints is due to a change in the games Core Constructed competitive play rules
Basically phase out means the creature and everything attached to it ceases to exist -- it doesn't change zones, it just goes poof , totally gone and can't be interacted with in any way, until it phases back in (exists again) at the beginning of its controller's next turn
Giving all permanents hexproof and indestructible is awesome in a format dominated by board wipes, but youre happy to use this against a single well-aimed piece of spot removal if the target is important enough
Thurid also gives all those creatures a bonus +1/+1, which is a pretty solid lord effect to have in the Command Zone