For five mana, he gives all your Elves +3/+3 and trample until the end of turn

The time has come for me to share my findings: Creatures (17) 1 Voidmage Prodigy 1 Azami, Lady of Scrolls 1 Patron Wizard 1 Supreme Inquisitor 1 Information Dealer 1 Vedalken Aethermage 1 Sage of Fables 1 Sigil Tracer 1 Stonybrook Banneret 1 Delver of Secrets 1 Archaeomancer 1 Goblin Electromancer 1 Melek, Izzet Paragon 1 Jace, Vryn's Prodigy 1 Jori En, Ruin Diver 1 Aberrant Researcher 1 Docent of Perfection Lands (38) 8 Mountain 11 Island 1 Volcanic Island 1 Remote Isle 1 Smoldering Crater 1 Riptide Laboratory 1 Lonely Sandbar 1 Forgotten Cave 1 High Market 1 Mikokoro, Center of the Sea 1 Miren, the Moaning Well 1 Steam Vents 1 Swarmyard 1 Tolaria West 1 Cascade Bluffs 1 Reliquary Tower 1 Command Tower 1 Sulfur Falls 1 Desolate Lighthouse 1 Temple of Epiphany 1 Wandering Fumarole Spells (44) 1 Brainstorm 1 Whispers of the Muse 1 Impulse 1 Serum Visions 1 Peer Through Depths 1 Mana Geyser 1 Eyes of the Watcher 1 Long-Term Plans 1 Mana Echoes 1 Amnesia 1 Library of Lat-Nam 1 Shattering Pulse 1 Overmaster 1 Telling Time 1 Quicken 1 Reiterate 1 Pongify 1 Haze of Rage 1 Mystic Speculation 1 Cryptic Command 1 Ponder 1 Diviner's Wand 1 Rite of Replication 1 Preordain 1 Red Sun's Zenith 1 Chaos Warp 1 Spelltwine 1 Cyclonic Rift 1 Epic Experiment 1 Firemind's Foresight 1 Rapid Hybridization 1 Interpret the Signs 1 Polymorphist's Jest 1 Dig Through Time 1 Impact Resonance 1 Mob Rule 1 Anticipate 1 Jace's Sanctum 1 Pyromancer's Goggles 1 Fiery Confluence 1 Mizzix's Mastery 1 Mystic Confluence 1 Rise from the Tides 1 Geistblast One thing Im concerned about is I have few ways to gain life

I guess this one could be interesting, as it lets you immediately cash in some of the stronger cards but I think it might just be a 99 card
The problem with Stella is that she's not always offering a benefit
And, for any typal decks focusing on a single creature type, the added changeling token gives you one more to add to your stockpile