Mono-White Combo Heaven

Makes people ragequit on untap.in

>Gameplan

This deck wants to do some shenanigans with Solemnity and any other card that utilizes counters. As for the win-condition, we play Altar of Dementia for the combo-win.

The Combo-Win

So at first we play four copies of Altar of Dementia, as it combos with Solemnity, Kitchen Finks and / or Safehold Elite. With that, we can mill the opponent out in one turn, once we assembled the combo.
The combo works like this:
We sacrifice one of our persist-creatures for Altar of Dementia, mill the opponent for X. Because of the persist ability of our creature, it will come back, but as no -1/-1 counters are put on them because of Solemnity, we can sacrifice them again with Altar of Dementia and get them back again, which wouldn't be possible without Solemnity, as the persist-ability only gets them back, when no -1/-1 counters are on the creature. This loop we can repeat infinetily.

The Center Piece

Of course we play three copies of Solemnity and I don't think any tutors are needed, since we have three Narset, Parter of Veils to dig for it.

Controlling the Game

We're looking to control the deck in a lot of ways. We're bouncing and killing the opponent's permanents with Path to Exile and Teferi, Time Raveler. Narset, Parter of Veils finds most of our combo-pieces for us. Cryptic Command is very versatile, countering spells, drawing cards and buying us more time against creatures. Remand also is in here, setting the opponent back a turn and buying us more time to set up the combo.

Synergies with Solemnity

For the synergies with Solemnity, we play seven persisters, with Heartmender and Kitchen Finks, both enabling the combo with Altar of Dementia. They are also pretty good by themselves, providing unlimited blocks, if we have Solemnity or Heartmender on board.
As for my main reason to build this deck, we have Nine Lives. It buys us an unlimited amount of time to find our combo-pieces, as no incarnation counters are placed on it.

Manabase

We have a pretty budget manabase, as we are only running basics, 4 Port Town and Glacial Fortress, for a total of 25 lands.

>Sideboard

For some general sideboarding-options we have Disenchant for Artifact and Enchantment hate. We also have Sorcerous Spyglass in case we play against planeswalker or to counter a Blast Zone some opponent's might sideboard in to get rid of our enchantments.

Tron:

To deal with tron, we sideboard a playset of Damping Sphere.

Dredge:

If we happen to play against dredge, we can sideboard in Settle the Wreckage, to stop their reanimated creatures from attacking us.

Heliod Company:

Against heliod company we can sideboard in Horribly Awry. Also our maindeck Solemnity really messes with them.

Burn:

Actually, with our ability to become invulnerable, I don't think a Leyline of Sanctity nor a Spellskite is needed.

>Budget

This deck is quite expensive, costing 155€ on cardmarket. The tilt is definetily worth it.