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Voltron Commander decks want to deal lots of damage, fast

Another is that it is an Artifact Creature that allows to work well in Delirium decks by hitting two different card types as well

And you may have Hardened Scales on the board

it just causes the ability to trigger an additional time

But then you can activate it for four mana to proliferate, so after your opponents' defenses have been set up and you cannot attack further you can do that a few times to finish them off

Dealing damage every time a player casts a non-creature spell could turn into quite a big number if you're playing opposite decks that don't have a lot of creatures