Can we track a level deeper than a card?

[Liv Marx]

Can we track a level deeper than a card? i.e. Can we make tasks in a checklist into cards that nest under a parent card? Or can we group cards in some way (other than labels, which feel too broad, or lists, which I'm using to track progress) to indicate they are part of the same project? I want more visibility than the checklists in cards, but the labels feel too broad.

For example, I'm creating a deck to pitch an idea. The label might be "Fundraising." The card would be "Create Pitch Deck." Inside of the card, I might have 10 tasks that I want visibility into e.g. "Outline deck," "Find stats on X," "Create Revenue Model," etc.

If I turn each of these tasks into cards, is there a way to group them? Or indicate they are part of the same project? 

What would you recommend for this use-case? Thanks!

[milynnus]

@Liv Marx 

One way to do this is to use cardlinks.