DedWards

The mana curve is a lot faster now.

Also, I just realised, with all the changes, only Slippery Bogle is blu, and seeing that it's hybrid, this deck isn't Bant anymore.

Geist is a cool card, but it isn't the best choice for this deck. This deck needs its speed, so the lower the mana cost, the better.

Geist of Saint Traft costs 3 mana where Silhana Ledgewalker and Kor Spiritdancer only cost 2.
Similarly, Steel of the Godhead only affects specific colour creatures (and it costs 3), so Spirit Mantle could replace it (especially with Geist of Saint Traft out).
The next one I'd consider lowering / removing is, surprisingly, Path to Exile. With how quickly your hexproof creatures should be getting big + Rancor / Spirit Mantle, there won't be much to stop your creatures.
Spider Umbra might be another option to reduce / remove...

You're missing a blue card that'd make the Honden extra awesome:
Paradox Haze

Kor Spiritdancer
Silhana Ledgewalker
Invisible Stalker
Spirit Mantle

There's actually a package of spells I add to almost all my Stompy / Stompy-esk decks:

4x Rancor (for obvious reasons)
4x Giant Growth (will be upgraded to Mutagenic Growth, once I get a set)
3x Vines of Vastwood (I only own 3, otherwise this would be 4x)

No Rancor?

No problem, glad to help :P
There's a large number of cards I'd consider, too many to list. Maybe once I get around to making an Undying / Persist deck, I'll post it and link you.

I believe that you'll come to love Sprout Swarm.
As for Mirrorweave, I think max 2 should be enough as it'll be very reliant on both a creature worth targeting and at least one Paradox Haze.

Thanks for the comment :)
Sad thing about Doubling Season (and Parallel Lives) is the fact that I don't have access to them (outside ordering them).

Sprout Swarm is an awesome Saproling production card that works wonders at the end of the opponent's turn :P
Convoke for 5 on each cast (convoke covers its buyback) and you get 1 Saproling, then use the new Saproling + 4 more creatures to repeat the process. It may not be infinite, but it does increase your number of Saprolings by a sizable amount.

Also, you may want to consider Evolving Wilds and / or Terramorphic Expanse. Getting the correct colour mana is very important.

With Paradox Haze out, if you Mirrorweave in your first upkeep, the upkeep effects will trigger in the extra upkeeps granted by Paradox Haze (just not in the original upkeep).

This is what I came up with:
http://www.mtgvault.com/dedwards/decks/undying-for-babyfridge/

This was made only with the cards you posted here and geared towards my preferred play style: aggro.

Before I say anything else, are these the qualities you have of each card?

Feels like something is missing.... Oh, that's right, counter spells

There's a fun little loop using Where Ancients Tread; Changeling Titan; and Changeling Berserker. Looping 3 of the Changeling's champion effects let's you loop the 5 damage that Where Ancients Tread does :P

Search for Tomorrow is one of my favourite land search cards as it can be suspended on the first turn :Do
Recross the Paths could work well in here as you have a fair number of high cost cards that will help you win the clash.

Trepanation Blade helps your creatures mill more. As does Paranoid Delusions. Both should be cheap ($) and easy to get hold of

Silhana Ledgewalker is an awesome card for this type of deck. It has hexproof and evasion (can only be blocked by creatures with flying).

A few cards that I use in my Korlash deck that might interest you:
Lashwrithe - get more out of Korlash's Grandeur ability.
Mutilate - awesome board sweep. Lashwrithe can save one of your creatures from dying to Mutilate.
Tendrils of Corruption - cool creature removal that gains you life.
Wayfarer's Bauble - land search that allows for a turn 3 Korlash.

A horribly underrated card that would probably do well in here: Sprout Swarm.