It bars them from attacking or activating abilities on the turn they're brought into play
34 Lands 11 Ramp : Dazzling Theater // Prop Room, Arcane Signet, Sol Ring, Firdoch Core, Patchwork Banner, Talisman of Unity, Silhana Starfletcher, Elvish Guidance, Arbor Elf, Freestrider Lookout, Elven Chorus 12 Target Removal : Kabira Takedown, Khalni Ambush, Masked Vandal, Coordinated Barrage, Chomping Changeling, Webstrike Elite, Gift of the Viper, Stalking Leonin, Scrapshooter, Legolass Quick Reflexes, Bridgeworks Battle // Tanglespan Bridgeworks, Vivien Reid 3 Board Wipes : Harsh Mercy, Winnowing, Dusk // Dawn 1 Graveyard Recursion : Dusk // Dawn 1 Graveyard Hate : Scavenger Grounds 1 Tutors : Vivien Reid 6 Protection : DAvenant Healer (mini), Saryth, the Vipers Fang, Swiftfoot Boots, Legolass Quick Reflexes, Tadeas, Juniper Ascendant (self-protection), Adept Watershaper 10,5 Card Draw : Botanical Plaza (1/2), Ohabi Caleria, Folk Hero, Elven Chorus (card advantage), To Arms

While she isnt really an Angel and doesnt directly reference the tribe, her proliferate ability strengthens +1/+1 counter-based Angels and supports lifegain engines that many Angel builds already lean into
Illustrated by Brian Despain Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp