Her -2 ability can also bring out a lower mana value creature to the board, which helps in what the deck is naturally trying to do (low mana value bodies accompanied by a higher mana payoff)
Others trigger off everything, like Blood Artist
This goes doubly so in the modern day of Magic where creatures are often printed with enter the battlefield effects that end up being much more important than their power and toughness values
When your cards are sorted, you can build decks without any issues, pull trade options when you need them, and avoid bringing damaged cards to games or meetups
Machina Assault Unit Continuous Spell Card Lore: Once per turn, if a Machine monster(s) is sent from your hand or field to the GY to activate a card or effect: You can target 1 "Machina" monster in your Spell & Trap Zone or your GY
It be like that sometimes