Good thing agatha has the kind of power that burn every piece of plantlife in asgard with a few words and a wave of her hand...
good thing she wouldn't do this in a million years if she thought it would kill someone.
He'd have to break through her shields which is highly doubtfull. These tendrils are no tougher than garden vines. He relies on being in a wooded area and people not seeing them. Not a problem here. If he hides in the woods agatha will simply burn them to the ground.
no she won't. she doesn't kill
And also very immortal. A bunch of spells is something of an understatement...
By immortal do you mean died in a fire? She was resurrected, but only by Scarlet Witch. She didn't have a hand in her own resurrection. If "a bunch of spells" is an understatement, then "ver immortal" is quite an overstatement.
But agatha as a mystique will probably have various texts pertaining to the lore, layout and nature o asgard. Black tom's pretty much boned other than knowing it's the home of the gods.
Hse might, but I don't see how that would help her. How would knowing Asgardian lore give her an edge planning wise?
They have, however, never been shown to be flame proof. i'd need a clarfication on this but I'm pretty sure all that plant life was burning during the ragnarok.
Even if it was, her decimating all the plant life in Asgard so she can kill her opponent is ridiculously out of character.
Secondly, this is a mystical places where magic is on the very wind. If anyone's going to get a powerboost here it's agatha
That hs never been the case with other magicians. If some of her magic is actually comes form Asgard, then yes, but it has never shown to come from there, and I highly doubt it would since that magic only goes to actual Asgardians usually. Just because the place is magical doesn't mean every single magician is in tune with it and gets a power boost.
Finally, as stated in my opening debate agatha's shields are resistant against both magic and physical damage so...
Yes, but she would eventualyl wear down. You compare it to Sue Storm's shield, and jsut like Sue, Agatha still "feel" every punch or stab that is blocked. Maybe not much, but it is still straining.
Now here's the thing, agatha is nice as pie if you're one of the good guys but one look at tom and he'll know this is a nasty piece of work. A violent psychopath.
Wait, how does looking like a tree clue her in to him being evil and sadistic? Generally most humanoid trees aren't evil.
Does that look evil? Him being a tree will in no way make her think he is instantly evil. If anything, she will think he is one with nature and be a gentle soul since all magicaians seem to love nature.
Don't let the nice old lady routine fool you. Agatha has a vicious streek when it comes to evil doers. She transformed sandman into solid rock, hell she even expelled nicholas scratch to a hell dimension. Did I mention? SCRATCH WAS HER SON. If she can condemn her own flesh and blood to an eternity of suffering I think sending a mad evil irishman to his death or simply doing the same and warping him to another dimension is well within her means.
1. She knew turning Sandman into rock wouldn't kill him, she doesn't know that fire wouldn't kill Black Tom (enough of it probably would)
2 SHE didn't banish her son. New Salem did. form wiki:
Outraged, Scratch attacked, swaying the community against him. The New Salem community then banished him to a dimension known as the Dark Realm.
As stated before, hide in the trees? Great, loads more kindling to make sure he gets barbecued good and proper!
well tachnically he won't be hiding in the trees, he will BE the trees, and the roots etc. She won't burn him blah blah blah (you know my defense by now about that

t: )
To reiterate a section of her powers
Agatha has a vast knowledge of sorcerous spells and incantations invoking names and aspects of various extra-dimensional objects and beings of power. Through these incantations the magi is able to call upon these extra-dimensional power sources for very specific effects without taxing the personal abilities.
Right a
SECTION of her powers come from extra dimensional objects. Only 1/3 of her powers do so, the rest are used by her own physical powers, and considering that we have seen her shields be broken before, I would venture to say that they aren't a part of that extra dimensional stuff.
She'll be busy relaxing while these power sources do the work for her...
The hell she will. And don't stick your tongue out at me mister!

t:
Black tom would have an advantage against most opponents, this I will agree. But against agatha he's simply outclassed
Like almost all magicians in the MU agatha can be described as having hugeamounts of power, but is never actually seen using all this power she supposedly has. Does Agatha Harkness have the ability to take out Black Tom? Yes. But the problem is that the only way to really beat Black tom is to completely kill him, and that is something Agatha will not do. She left the New Salem witch community because she wanted to be with humans. She loves humans and mutants alike, and would never just go around killing one. She would die before she did that.
Also, I would like to point something out.
Some of her greatest feats weren't actually her doing. Agatha didn't revive Wonderman from death, Scarlet Witch did. Many of Agatha's larger feats were done when she came back to life. Actualyl, she didn't come back to life. Scarlet Witch was just insane (good job mentoring her Agatha) and reanimated her corpse. All the power she had, wasn't even hers, it was Scarlet Witch's.
WINNER- Black Tom