The summary of the text is:
- The text is a transcript of a video about the power levels of different symbiotes in the Marvel universe, ranked from weakest to strongest.
- The text introduces each symbiote with some background information, their powers, their feats and their weaknesses.
- The text covers 22 symbiotes, starting with Agony and ending with Knull, the God of Symbiotes.
- The text also mentions some alternative versions of symbiotes, such as Spider-Girl, Bizarnage and Anti-Venom.
- The text asks the viewers to like and subscribe to the channel and announces the next video topic.
Here are the key facts extracted from the text:
1. **Agony** can absorb and release chemical substances and spit out corrosive acid.
2. **Life Foundation** created Agony and other symbiotes for super soldier experiments.
3. **Phage** was a mercenary used in Life Foundation experiments, with powers inferior to Venom and Carnage.
4. **Lescher** can create spear-like tentacles and is considered the quietest of the symbiote siblings.
5. **Riot** is known for its violent nature and ability to manipulate firearms.
6. **Scream** was the last symbiote created by the Life Foundation and has killed other symbiotes.
7. **Mania** is another offspring of Venom with all of Venom's powers but to a lesser degree.
8. **Hybrid** is a fusion of four Life Foundation symbiotes with combined powers and personalities.
9. **Venom** became a new God of Symbiotes with upgraded powers, including control over the symbiote horde.
10. **Carnage** is more powerful than Venom, with no limits to his psychopathic tendencies.
11. **Toxin** is Carnage's offspring and has proven to be more powerful than both Venom and Carnage.
12. **Grendel**, a dragon symbiote, is stronger than standard symbiotes and resistant to their common weaknesses.
13. **All-Black**, the Necrosword, is a powerful symbiote weapon capable of killing Celestial beings.
14. **Knull**, the God of Symbiotes, controls all symbiotes and is an immensely powerful cosmic being.
These facts are based on the characters' abilities and roles within the Marvel universe as described in the provided text.