This clearly doesnt belong in just about every deck but if your local meta has heaps of equipment matter decks, you can turn someones 20/18 First strike, menace, temple, flying, lifelink Rograkh back into a more manageable 0/1
You can feel Safer Sephiroth taking your life force away
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(But then, when do I tackle simple issues in my column?) Mostly, because different players like it for different reasons
If enough -1/-1 counters are put on a creature you control at the same time to make its toughness 0 or less, Buzzard-Wasp Colony's last ability will see all of the +1/+1 counters it had when it died as well as the -1/-1 counters it had, and an equal number of each of those types of counters (plus any other applicable counters) will be put onto Buzzard-Wasp Colony
You bounce them back to your hand after the Intruder Alarm trigger untaps your creatures, then tap them again to replay it