In Magic terms, the initiative is a designation that a player can have during the game (similar to the monarch from some other sets)
With nearly thirty years of history, Magic: The Gathering has many casual and competitive MTG formats
It gives you a cheap, small damage sweeper in the early game, or you can foretell it to be a more impactful sweeper later on
When she enters the battlefield, you get to look through your library for a goblin card
It's also really well costed: you can play it for six colorless mana, three Sultai mana, or anywhere in between
I certainly have been having tons of success with blue, but the format is quite well balanced, so every color has multiple good decks you can get into