Wincons outside of typical black combo pieces, especially the Revel in Riches and Marionette Master pieces to take advantage of those Treasures, are a bit lacking in Mari's supported creature types
I think at first glance, folks might discount just how quickly counters will pile up
Troll Level: Cudgel Troll Meteorite Direct damage and mana production
The fact that you can cast this card, exile something, draw a card, and gain life are all very desirable characteristics on a planeswalker card
Aettir and Priwen Astrologian's Planisphere Bard's Bow Black Mage's Rod Buster Sword Coral Sword Crystal Fragments Dark Knight's Greatsword Dragoon's Lance Excalibur II Genji Glove Lion Heart Machinist's Arsenal Magitek Scythe Monk's Fist Ninja's Blades Paladin's Arms Red Mage's Rapier Sage's Nouliths Samurai's Katana Summoner's Grimoire The Masamune Thief's Knife Ultima Weapon Warrior's Sword White Mage's Staff World Champion, Celestial Weapon
The characterization of Zendikar's iconic floating islands shines