I'm not so sure about this seeing modern play. Needing 4 creatures with flying is rather specific, outside of WB tokens. Given its sweeper protection, it may replace an anthem, but afaik that deck hasn't been competitive for some time now. And Battle Screech does not appear to be that huge an upgrade over what the deck could do so far to change that.
WB tokens will not be tier 1, but this is an interesting option for the deck. When you have 8 cards that can single-handedly help you cast this for the alternative cost, it is pretty consistent. Just not sure she is impactful enough to warrant a spot. Maybe sideboard?
If your goal is to cast her on Turn 4, I think Modern is the best shell.
WB tokens will not be tier 1, but this is an interesting option for the deck. When you have 8 cards that can single-handedly help you cast this for the alternative cost, it is pretty consistent. Just not sure she is impactful enough to warrant a spot. Maybe sideboard?
If your goal is to cast her on Turn 4, I think Modern is the best shell.
8.RG Green Devotion Ramp/Combo 9.UR Draw Triggers 10.WUR Group stalling 11.WUR Voltron Spellslinger 12.WB Sacrificial Shenanigans
13.BR Creatureless Panharmonicon 14.BR Pingers and Eldrazi 15.URG Untapped Cascading
16.Reyhan, last of the Abzan's WUBG +1/+1 Counter Craziness 17.WUBRG Dragons aka Why did I make this?
Building: The Gitrog Monster lands, Glissa the Traitor stax, Muldrotha, the Gravetide Planeswalker Combo, Kydele, Chosen of Kruphix + Sidar Kondo of Jamuraa Clues, and Tribal Scarecrow Planeswalkers
WB tokens? Bitterblossom?
8.RG Green Devotion Ramp/Combo 9.UR Draw Triggers 10.WUR Group stalling 11.WUR Voltron Spellslinger 12.WB Sacrificial Shenanigans
13.BR Creatureless Panharmonicon 14.BR Pingers and Eldrazi 15.URG Untapped Cascading
16.Reyhan, last of the Abzan's WUBG +1/+1 Counter Craziness 17.WUBRG Dragons aka Why did I make this?
Building: The Gitrog Monster lands, Glissa the Traitor stax, Muldrotha, the Gravetide Planeswalker Combo, Kydele, Chosen of Kruphix + Sidar Kondo of Jamuraa Clues, and Tribal Scarecrow Planeswalkers