msem-instigator

Whenever an opponent fails a trial, create a 1/1 white Angel creature token with flying.

You may cast target card in an opponent's graveyard without paying its mana cost.
Flashback {4}{B}{G}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Destroy target artifact or land.
Kindle 2—{R}, Sacrifice an artifact or land. ({R}, Sacrifice an artifact or land, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Destroy each artifact with mana value X or less, then create an Idol token for each artifact destroyed this way. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

When Desert Bloom enters, you gain 4 life.
At the beginning of your upkeep, add {G}{G}.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
{2}, Sacrifice a creature: Put a +1/+1 counter on Desert Marauder.

Desert Slaughterer can't block.
{B}, Remove a +1/+1 counter from a creature you control: Return Desert Slaughterer from your graveyard to the battlefield with a +1/+1 counter on it.

Desert Storm deals 6 damage to target creature.

Prowess
At the beginning of combat on each of your turns, you may draw a card. If you do, discard a card.

Create two 1/1 red and white Sand Warrior creature tokens.

Desert Wurms can't be blocked by creatures with flying.
When Desert Wurms enters, create two 6/6 red Wurm creature tokens with “This creature can't be blocked by creatures with flying.”
When Desert Wurms is put into a graveyard from anywhere, shuffle it into its owner's library.

Target permanent you control gains protection from your opponents until end of turn.
Draw a card.

Gain control of target creature until end of turn. Untap that creature. It gains haste and menace until end of turn.

Reveal the top four cards of your library. You may put a creature card and/or a land card from among them into your hand. Put the rest into your graveyard.

Cast this spell only if you have 10 or less life or if you control six or more lands.
All creatures get -5/-5 until end of turn.

Choose one. You may choose both if an opponent controls three or more tapped creatures.
• Creatures target player controls lose all abilities until end of turn.
• Destroy target tapped creature.

Once each turn, when you foretell a card or cast a foretold spell, you may create a 1/1 blue Rogue creature token.
{1}{U}{B}: Draw a card, then discard a card.

You draw a card and you lose 1 life.
Whenever you cast a spell from anywhere other than your hand, you may pay 1 life. If you do, return Desolate Advance from your graveyard to your hand.

Menace
Whenever Despair Scavenger attacks, you may have target creature get -1/-1 until end of turn.

Desperate Android enters tapped.
Whenever another artifact you control dies for the first time each turn, return Desperate Android from your graveyard to your hand.

Target opponent may have Desperate Contrition deal 4 damage to them. If that player doesn't, you draw three cards.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

{1}, Sacrifice a creature: Desperate Forsaken gets +1/+1 until end of turn. You gain 1 life.

Sacrifice a land: Desperate Ravager gets +2/+0 and gains haste until end of turn.

Haste
Whenever Desperate Reconnoiterer becomes untapped, scry 1.