Drain the jackfruit and use a fork to shred the pieces into a pulled-meat texture, removing any hard core bits.
Heat a non-stick skillet over medium heat and add the shredded jackfruit and seitan crumbles, searing until the edges begin to brown.
Stir in the black beans, nutritional yeast, garlic powder, cumin, smoked paprika, salt, pepper, and water.
Reduce heat to low and simmer for 5-7 minutes until the liquid is absorbed and the flavors are well combined.
While the filling simmers, mash the avocado with lime juice in a small bowl until completely smooth and velvety.
Warm the corn tortillas in a dry pan or over an open flame for 30 seconds per side until pliable and slightly charred.
Divide the jackfruit and seitan mixture between the tortillas, top with a dollop of avocado crema, and garnish with fresh cilantro.