The fact that The Fourth Doctor returned to the battlefield means its ability can trigger again, so you can use Sensei's Divining Top to draw a card and put it on top of your library, which starts the infinite combo for infinite card draw, infinite ETBs, infinite LTBs, infinite draw triggers, infinite storm triggers, and infinite Food Tokens
This mechanic appears to interact with other players' graveyards and bring creatures back to the battlefield under your control, only as a Borg rather than their previous types
A few other inexpensive creatures like Trailtracker Scout also tap for one mana and get the buff, usually with some other ability that can be situationally useful
Featured card images are examples from the set and are not guaranteed pulls
13, 2026 When I would play a Digimon card to the breeding area, can I perform a DigiXros or Assembly for the card to be played