With Ivy, you generally build it as a very different Voltron-style deck, casting a bunch of enchantments and single-target spells and turning them into two-for-ones by making sure you target someone other than Ivy
Alpine Guide Arid Mesa Bedhead Beastie Bloodstained Mire Bountiful Landscape Cabaretti Courtyard Call the Mountain Chocobo Chartooth Cougar Cragsmasher Yeti Farseek Furnace Host Charger Gem of Becoming Grixis Panorama Hill Gigas Igneous Pouncer Jeskai Monument Jund Panorama Koth, Fire of Resistance Maestros Theater Mardu Monument Molten Man, Inferno Incarnate Mongoose Lizard Mountain Valley Naya Panorama Oliphaunt Perilous Landscape Riveteers Overlook Rocky Tar Pit Ruin Grinder Seething Landscape Seismic Monstrosaur Shard Convergence Shattered Landscape Sheltering Landscape Spoils of Victory Temur Monument The Cave of Two Lovers The Infernus There and Back Again Twisted Landscape Untamed Wilds Valley Rannet Wooded Foothills Zog, Triceraton Castaway
This last partnership is the key to having great mana in Modern, and the majority of your mana bases should begin here
Think Angel of the Ruins, Krosan Tusker, Striped Riverwinder, and Shefet Monitor
These cards are officially produced WotC products