The Basic Grass Energy card powers Grass-type attacks
Due to its low cost, it finds itself in plenty of Steel decks where just using items in general provides synergy with their other cards
(You can't cast this spell unless you have legal choices for all its targets.) Sorcery Color tag templates(None) Color tag templates(None) Nature's Lore Search your library for a Forest card, put that card onto the battlefield, then shuffle
Adaptive Enchantment - Estrid plays a little differently that many
Of course, casting a spell that has transmute certainly counts as casting a spell, though transmute is completely irrelevant in that case

These are the cards banned in Modern: Amped Raptor Ancient Den Arcum's Astrolabe Birthing Pod Blazing Shoal Bridge From Below Chrome Mox Cloudpost Dark Depths Deathrite Shaman Dig Through Time Dread Return Eye of Ugin Field of the Dead Fury Gitaxian Probe Glimpse of Nature Golgari Grave-Troll Great Furnace Grief Hogaak, Arisen Necropolis Hypergenesis Jegantha, the Wellspring Krark-Clan Ironworks Lurrus of the Dream-Den Mental Misstep Mycosynth Lattice Mystic Sanctuary Nadu, Winged Wisdom Oko, Thief of Crowns Once Upon a Time Ponder Punishing Fire Rite of Flame Seat of the Synod Second Sunrise Seething Song Sensei's Divining Top Simian Spirit Guide Skullclamp Summer Bloom The One Ring Tibalt's Trickery Treasure Cruise Tree of Tales Umezawa's Jitte Underworld Breach Up the Beanstalk Uro, Titan of Nature's Wrath Vault of Whispers Violent Outburst Yorion, Sky Nomad Often, the most oppressive cards in Standard will also be hit with a ban in Modern