If this happens, the ability will still resolve and you'll put a +1/+1 counter on Sharp-Eyed Rookie and investigate
The reason is because it so much easier to sell the non-foil promo cards, so most players are aiming to earn 18-20 tickets, and even if you earned 20 on Day 1, getting another 70 is a tall feat, unless you have a way of combining tickets with friends/teammates
What's important about the design of this card, however, is that it can also sacrifice itself, giving you an easy way to add two card types to your graveyard
Saint Traft and Rem Karolus is her backup - this will reward you for convoking with loads of tokens, which can only further your convoking efforts
16 Toxrill, The Corrosive A Serious Threat With Little Escape Printed in Innistrad: Crimson Vow alongside Umbris, while Toxrill, the Corrosive may cost a hefty seven mana, once cast it is capable of single-handedly taking over a Commander game
A lot of lists include OP03-078-issho, so try not to hold more than 5 cards in hand so they don't trash two of them
