One of these rumors is that Modern Horizons II has a new cycle of no mana cost suspend spells in the vein of Crashing Footfalls, Restore Balance and Living End
That is a little too much for a targetted discard card at two mana
And her five color capacity is often a boon
If you somehow control Phenomenon Investigators and no choice was made for it (perhaps because another permanent on the battlefield became a copy of it, or it was manifested and later turned face up), it has neither of the two triggered abilities, no matter how much you want to believe (or doubt)
That said, you can pack your deck with Hyena Umbra, Spirit Mantle and Aura-based removal like Darksteel Mutation, Chains of Custody and Ossification to get your card draw up for Sram
Individual cards from these sets will continue to be legal in any format in which they are already legal