Maybe he have super armor?The unsurpassed one

or u facing gaara suit?

Both of Indra's Mysteries doesn't causes any starting combo at all, except for High Combo.

It's just an excess animation.

If you search Indra in the search section of strategy you will find a post originally from a mod that states the susanoo mystery part has knockdown.

It is ICE* in https://forum-narutoen.oasgames.com/page/show-post-49483-1.html.

That site sometimes has incorrect information.

Right now the info im giving you is straight from chinese version of this game.

it doesnt cause knockdown

I have read a discussion similar to this recently and the mod stated that what is actually in game is real regardless of what is stated on updates or even on the in-game bulletin board that no one reads. If in doubt, submit a trouble ticket directly to Oasis and skip the forum altogether.

The problem is that they have no clue themself what ninja does a lot of the times and translation in the game are wrong as well so the information inside the game is not "real" at all.

Ice did poor job with that guide and that's all, he copied translations from the game (that are wrong in the first place) since Indra dodge is not "very high chance" like 6p naruto but evasion based then he copied wrong translation from konoha proxy (he didn't have indra himself most likely) about susanno mystery having knockdown and here we are. Game translations wrong, forum moderators misleading people for a ninja that costs what 1800$ ?

In any normal game you could 100% ask and get refund, developer would instantly fix the wrong translation, dropped some apologies and compensation to the playerbase but it's naruto online so good luck basicly.

PS. Yujin is right about Indra not having knockdown from day1 on chinese servers so it's not a bug and won't be fixed.

There we go, it's always about getting compensation xD