This was one of duel standbys prior descriptions
Each player's starting hand increases by 1 card. You cannot activate Spell/Trap Cards or monster effects on your first turn.
multiple skills have the or monster effects description now
Amano returns to the hand during the end phase, the effect lock from the skill balance lasts only until the end of the main phase, so Amano will return to the hand anyways.
*sorry, I mean "you don't read the update PROPERLY, right"
Amano-Iwato deck was great because Duel Standby used to prevent it from returning to hand during End Phase. But since Duel Standby now also prevents you from Normal Summoning Amano, you have to use another skill. Except, other skills that got nerfed, only prevents effects in Main Phase. Amano's bad End Phase effect will still activates.