What makes it important is that it is a Saga, so it can be recurred and/or counter manipulated to provide repeatable board wipe if needed
You can force your opponent into being reactive to this if you set up your board with characters before she comes down
Faciliers Cards 101 $0.05 Stolen Scimitar 102 $0.06 Abu 103 $0.18 Aladdin 104 $0.05 Aladdin 105 $0.05 Captain 106 $0.17 Captain Hook 107 $0.06 Donald Duck 108 $0.09 Elsa 109 $0.07 Gaston 110 $0.06 Goofy 111 $0.18 LeFou 112 $1.83 Maleficent 113 $1.05 Maui 114 $11.20 Mickey Mouse 115 $0.08 Minnie Mouse 116 $0.12 Moana 117 $0.25 Mulan 118 $0.08 Peter Pan 119 $0.12 Pongo 120 $0.10 Rapunzel 121 $0.08 Scar 122 $0.20 Scar 123 $0.05 Sergeant Tibbs 124 $0.16 Stitch 125 $0.18 Te K 126 $0.09 Tigger 127 $1.47 Be Prepared 128 $0.08 Cut to the Chase 129 $0.09 Dragon Fire 130 $0.15 Fan the Flames 131 $0.05 He's Got a Sword
Stop me if you're heard this before, but it combos off with Niv-Mizzet, Dracogenius and Niv-Mizzet, the Firemind
Of course, that isn't to say that the Emerald/Sapphire deck is without value, as it is still an incredibly impressive option and perfect for those who've been wanting some Big Hero Six cards
Ultimately, Lorcana probably isnt a Magic killer but maybe it doesnt have to be