Whenever chaos ensues, you may search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle
Add in cards like Warden of the Inner Sky that let you tap your creatures on command, and youve got a reliable piece of disruption on your hands
Biogenic Upgrade You get a lot of power with Biogenic Upgrade provided that you have at least one creature that already has some +1/+1 counters
So, it has every right to be one of the strongest abilities
I didn't have much of a chance to play Old School this month, but I got in a few good games against Troll Disco
That also means that when dealing with him, having access to cards that are effective to his predecessor also should work against Neo Exdeath, for example non targeting effects like [1-107L] Shantotto or having cards that wants to be placed in the break zone on purpose, like [10-104R] Ranperre or [1-135L] Golbez