With a poof.
The slug Hashirama Senju summoned was far larger than the one Tsunade could summon.
It was several times larger even than Orochimaru's Manda or Jiraiya's Gamabunta.
All summoned slugs were parts of the Slug Sage. The stronger the summoner, the larger the fragment of the Slug Sage they could summon.
"Slug Sage, sorry for the trouble, but please bring my granddaughter Tsunade here with Reverse Summoning!"
Hashirama Senju pressed his palms together, his manner deeply respectful.
The bond between Hashirama and the Slug Sage was nowhere near as strong as the one between Jiraiya and the Toad Clan.
Hashirama had rarely summoned slugs in his past battles.
He was not even as close to the Slug Sage as Tsunade was.
"Hashirama, you've come back to life?"
"No, is this Impure World Reincarnation?"
"I understand. I'll bring Tsunade here with Reverse Summoning right away."
The enormous fragment of the Slug Sage used its chakra feelers to form a black summoning array on the ground.
Both Hashirama and Tsunade had contracts with the same slug.
That meant every fragment of the Slug Sage could perform Reverse Summoning on those who held contracts with it.
This technique was an extremely powerful means of escape.
Yet few ninjas in the Shinobi World used Reverse Summoning as a way to flee for their lives.
Of course, most ninja beasts could not master Reverse Summoning.
As a result, it was easy for contractors to summon ninja beasts, but rare for ninja beasts to reverse summon their contractors.
Only powerful hidden ninja beast realms like the Three Sage Realms and Enma's Sacred Land had more powerful ninja beasts capable of Reverse Summoning.
Meanwhile, Tsunade, who was gambling heavily in Tanzaku Town, suddenly sensed her summon initiating Reverse Summoning.
Tsunade had no idea what