Excavation Torch 1W
Artifact - Equipment (Common)
Equipped creature gets +1/+1.
Whenever equipped creature attacks, venture into the dungeon.
Equip 3 “Doesn’t everyone have night vision?”
Veteran Labyrinth Explorer 3W
Creature - Human Warrior (Common)
When Veteran Labyrinth Explorer enters the battlefield, venture into the dungeon. Her glorious stories ignite a fire in the hearts of the next generation of adventurers.
Wandering Bard 3G
Creature - Dragon Bard (Uncommon)
At the beginning of your end step, if a land entered the battlefield under your control this turn, venture into the dungeon. “A new story is born at every turn”
Even more venturing shown here. White is the main venture color, and of course we needed venture landfall for the flavor win.