Hi! I've been looking on the wiki and the forum for tips on if this is true or not, but does Teemo's E apply the slow for his auto attacks with his passive when he has rylais? If so, does Rylais give burn with liandrys? does Liandrys also stack with frozen mallet?
Thank you :)
no no and no
Edit: Well rylais does work with liandrys but not with his autos
On-Spell Effects The following effects occur when your champion's ability deals damage, rather than when the ability is casted. They won't trigger if the ability is blocked or you miss the ability.
and
Toxic Shot will apply Morellonomicon's passive. (implies that on spell effects are applied)
From the wiki, followed by examples of items with On-Spell Effects like 
passive gets amplified by any movement impairing effects (slows, stuns, snares,...) so yes Rylai's and Frozen Mallet make it stronger.
Hope that helped!
