The only unique quirk it brings to the table is the potential to reduce an opponent's life points to an odd number, whether by halving the monster's attack or through a card like Solemn Judgement that halves their life points as a whole
(2021-04-16) If the spell requires targets, you choose the target of the original spell as you cast it
The set this time around
While the enlarged cards arent designed to be actually played with, all of the jumbo cards are official releases - making them technically legal to play in an official Pokmon tournament
For example, let's look at the card above, which has two separate Cascade keywords: Cast the spell (in this case, Call Forth the Tempest)
While one of the goals of Modern Horizons 3 is to shake up Modern with the introduction of brand new cards, this set also has the New-to-Modern bonus sheet, which contains reprints that will become legal in Modern for the first time