If this card is destroyed on the field by a card effect, the controller of Overflow can then add one Cyber Spell/Trap card to hand
Once were G/B, however, why not just be something more like: Creatures (18) 4 Sylvan Advocate 2 Mindwrack Demon 1 Tireless Tracker 4 Gnarlwood Dryad 1 Ishkanah, Grafwidow 4 Grim Flayer 2 Verdurous Gearhulk Planeswalkers (4) Lands (22) Spells (16) This path looks very promising to me
(2) You can target 1 Amazoness card you control and 1 Warrior Amazoness monster in your GY
Finally, since you have this level of access to the older utility options, you can fill out the deck with other disruptive tools, such as negation standard tech cards or even Xyz Import
While Phyrexian Vindicator could see play in casual or themed decks, it may not be a top choice for optimized competitive decks
Let me know by voting below