[Suggestion] Give us iron! Challenge event rewards

[Gryphonknight]

@TGW

regularly complaining about not enough ham,

5* heroes and 4* troops

@Gryphonknight

1x 5* 4.80 hero=
‭3.825‬x 4* 4.70 heroes=
‭22.17x 3* 3.50 heroes