They contain a mix of board builders (Xyz "Rilliona"), field control (Synchro "Zoroa", Fusion "Zoroa", "Invoked Magistus Omega", "Aiwass"), and recovery ("Ninaruru", Link "Endymion")
While this token will have a stronger attack for each monster you get rid of, it is much better than having effects on the board that can stop you from playing
Since it exiles itself, you only get one shot, but that shot can swing a game by putting multiple tools back into your hand when you need them most
Ward 2 also offers a modest bit of protection, forcing other players to spend two mana just to cast a spell on any creatures affected by Yunas ability
And regarding the two cards you mentioned I love those and I have them already as my main cards in my National binder haha Great minds think alike