Deathtouch Rule 702.2 Glossary

A keyword ability that causes damage dealt by an object to be especially effective. See rule 702.2, “Deathtouch.”
Indestructible Rule 702.12 Glossary

A keyword ability that precludes a permanent from being destroyed. See rule 702.12.

Rulings (2)

April 18, 2017 Wizards of the Coast
You don't have to attack with another creature with power 4 or greater for Rhonas to be able to attack. The same is true of blocking.
April 18, 2017 Wizards of the Coast
Once Rhonas has attacked or blocked, it will remain in combat even if you no longer control another creature with power 4 or greater.

Other Printings