CardName: Tunnelpack Hellions
Cost: 4RRR
Type: Creature - Hellion
Pow/Tgh: 7/6
Rules Text: When Tunnelpack Hellions enters the battlefield, destroy all
non-basic non-token lands. For each land put into a
graveyard this way, its controller puts a colorless land
token named Cave onto the battlefield tapped with "{T}: add
{C} to your mana pool."
Flavour Text:
Set/Rarity: Multiverse Design Challenge Mythic
Tunnelpack Hellions
M
Creature – Hellion
When Tunnelpack Hellions enters the battlefield, destroy all non-basic non-token lands. For each land put into a graveyard this way, its controller puts a colorless land token named Cave onto the battlefield tapped with ": add to your mana pool."
: add 
to your mana pool."
See Challenge # 145 and Cave.
Interesting! Plays in a similar space as Blood Moon.