The source of an activated ability is the object whose ability was activated, and the source of a triggered ability (other than a delayed triggered ability) is the object whose ability triggered
Creature - Sphinx Color tag templates(None) Craterhoof Behemoth Haste When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control
Funnily enough, it's not even a budget option, running around $5 for either version
Even though this is a weaker version of Necropotence, it has still made a deck in Legacy of all places
Group Hug decks are all about giving everyone an advantage and then either building around it to best prepare or to make nice so no one wants to attack them
Now you can buy the best custom Rebel tokens made by Mystic Tokens to accompany your Rebel Tribal deck