In spanish the objectives do not say “Cast X creatures with cost Y or less” it says the equivalent at “Summon X creatures with cost Y or less” in the previous event where the tokkens counted as summoned.
This error has costed me a lot of points as I have choosen my Planeswalker and its deck for this node thinking in Summon and not in Cast.
Please be more careful with the wording in the whole game.