When The First Doctor enters the battlefield, search your library and/or graveyard for a card named TARDIS, reveal it, and put it into your hand. If you search your library this way, shuffle.
Whenever you cast a spell with cascade, put a +1/+1 counter on target artifact or creature.
![The First Doctor (Serial Numbered) [Doctor Who]](http://tothetablebgc.myshopify.com/cdn/shop/files/6a040be4-4ffb-49f6-82fe-24140aa6be19_d5adfa0d-5e51-4721-b203-03763b920725.png?v=1776542737&width=1445)
