All in all, as cool as the design for this card is, I would not expect it to be incredibly popular
It features two pre-constructed decks in one box, each designed for cutthroat competition
Giada also reads: Each other Angel you control enters the battlefield with an additional +1/+1 counter on it for each Angel you already control. This is an absurdly powerful ability and, while its definitely going to find a home in Commander, the low mana value means it could theoretically see play in any format you might find other angels
I guess the official game rule cited on the bottom of the rules card wasn't enough to legally protect PGI Limited from a lawsuit
Glacial Beast Blizzard Wolf X WATER Level 4 [ Aqua / Effect ] ATK 1400 DEF 700 When a monster declares an attack: You can negate the attack, and if you do, Special Summon 1 Level 4 or lower WATER monster from your hand, except "Glacial Beast Blizzard Wolf"
It wasn't quite that easy, but the teams went above and beyond to figure out how to make it happen