If either of the target permanents is an illegal target when Oko's last ability resolves, the exchange won't happen
mthursty March 7, 2025, 7:48pm 2 I believe it is assumed those cards were printed on ancient mew card stock
For example, if you control Phial of Galadriel and have no cards in hand and you're instructed to "draw two cards," your first card draw is replaced by drawing two cards, then you'll draw the second card from the original instruction
Finally, 2002s Legendary Collection was the very first set to include reverse holo cards and they had a firework style pattern that remains unique to this day
We must also remember that negative counters, such as -1/-1 and Stun counters, will also be copied
However, like Necropotence, it was eventually pushed to such a degenerate place that fewer and fewer games were actually interesting when it was on the table