They are the same size as normal MTG cards.
And allowing players the option of casting a known, predictable spell can take away some of the frustration that can show up with randomized effects
Play Future Fusion, select Five-Headed Dragon, then send this card, Red-Eyes Darkness Metal Dragon, and 3 other Dragons to your Graveyard
Unless its a bad deck, you're statistically guaranteed to win ~50% of the time
This scale 1 Pendulum monster allows you to add any level 4 or lower Performapal from your deck to your hand, effectively acting as a Performapal Skullcrobat Joker you dont have to waste your normal summon on
It's enjoyable, but it'd be even more so if there were just a few more competitive cards - or fewer cards that have nothing to do with Inventors