Need card recommendations for Toph, hardheaded teacher!

[oblique musk]

[[Toph hardheaded teacher]] looks like such a fun build!

I'm kinda having a hard time where I want to take her. I don't want to use [[field of the dead]] or [[glacial chasm]] in this list

[rigid citrus]

https://scryfall.com/card/tla/246/toph-hardheaded-teacher

Toph, Hardheaded Teacher <:mana2:292901509060886528><:manar:292901508796645397><:manag:292901508654301185>

Legendary Creature — Human Warrior Ally
When Toph enters, you may discard a card. If you do, return target instant or sorcery card from your graveyard to your hand.
Whenever you cast a spell, earthbend 1. If that spell is a Lesson, put an additional +1/+1 counter on that land. (Target land you control becomes a 0/0 creature with haste that's still a land. Put a +1/+1 counter on it. When it dies or is exiled, return it to the battlefield tapped.)
3/4

https://scryfall.com/card/m20/247/field-of-the-dead

Field of the Dead

Land
This land enters tapped.
: Add .
Whenever this land or another land you control enters, if you control seven or more lands with different names, create a 2/2 black Zombie creature token.

https://scryfall.com/card/me2/229/glacial-chasm

Glacial Chasm

Land
Cumulative upkeep—Pay 2 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When this land enters, sacrifice a land.
Creatures you control can't attack.
Prevent all damage that would be dealt to you.

[eternal bobcat]

I think you should run like

Khamal

Things like [[mutuavault]]

[rigid citrus]

https://scryfall.com/card/clb/903/mutavault

Mutavault

Land
: Add .
: This land becomes a 2/2 creature with all creature types until end of turn. It's still a land.
Some worlds possess a hidden core where life's essence constantly surges.

[eternal bobcat]

You can run some lessons if you want