(6/6/2025) Although Yuffie enters attacking when its ninjutsu ability resolves, it was never declared as an attacking creature (for purposes of abilities that trigger whenever a creature attacks, for example)
They cannot get any smaller than they are, as they are the same size as a credit card
Neferabyss, the Ogdoadic Overlord Level 10 DARK Reptile Effect Monster ATK/ 2200 DEF/ 3100 You can only use the (1) and (2) effects of this card's name each once per turn
If used for an Xyz material, it can be used for a detach effect to put it back into the Graveyard for use on your next turn rather than banishing it
In Modern however, the monkey is less problematic, since there is no Force of Will or Daze to protect him through the early turns
By Tributing any Monster on the field, you could Special Summon any Frog Monster from the deck