It has a similar effect to Garoth, in that by detaching an XYZ material you can mill the top 3 cards of your deck, while drawing a card for every Lightsworn monster that was milled this way
Youre on the play, and on turn 3 you nuke their tapped dual land with Stone Rain
You add another 200 cards to that mix, and you're at 160,000, and it just gets completely wild: the level of complexity that you can get into and making sure that none of that gets to be too powerful, but still trying to make sure that things are fun and exciting for whichever fan gets that card
While there might already be some creatures in your graveyard through the normal course of play, the rad counters from Strong should really help with that
At the time of writing, Liliana Vess is the most valuable of these autographed cards at roughly $600 on TCGplayers marketplace, with Ajani Goldmane coming in at around $110 being the lowest
It sounds simple, but as you can see, theres a lot going on when it comes to MTG