Using her ability with Bibbidi Bobbidi Boo allows you to play a character twice in one turn, which could be devastating to the opponent if youre replaying the likes of Tinker Bell Giant Fairy to rack up big damage on their board or Lucifer Cunning Cat to make them discard two actions or up to four cards, which very may well be their entire hand
Relic of Progenitus has long been the go-to graveyard hate sideboard card of more synergistic decks that wanted to be able to keep the cards flowing, and being able to eat your opponent's graveyard either slowly or quickly while maintain card parity is amazing
It's definitely strong though
Which probably makes this the worst Chromicon out of all of them
Either way, you really need to capitalize on those +1/+1 counters, so I suggest you start with our articles on bolster, outlast, and adapt
That permanent gains Haste, When this permanent leaves the battlefield, it deals damage equal to its mana value to each creature, and At the beginning of your end step, sacrifice this permanent. Terminal Velocity is a bit of a mish-mash of different effects