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
On the other hand, my friend and fellow Commander writer on this very site, Stephen Johnson, is a player and deck-builder I really admire
Looting, named for Merfolk Looter, tends to be in blue, while rummaging, named for Rummaging Goblin, tends to be in red
For example, Yanmega Ex is great in Grass decks not because that is its type, but rather because it's not weak to Fire, and instead it's weak to Electric