Ozzen Headquarters enters tapped.
{T}: Add {W} or {B}.
{T}, Discard another card named Ozzen Headquarters: Draw a card.

Choose one. For every two different creature types among creatures you control, you may choose another —
• Target creature gets +3/+3 until end of turn.
• Target creature you control fights another target creature.
• Add three mana of any one type.
• Draw a card.

Create a token that's a copy of target creature you control, except it has haste. Sacrifice it at the beginning of the next end step. If {G} was spent this spell, the token must be blocked each combat this turn if able. If {B} was spent to cast this spell, the token gains deathtouch.

Mill three cards, then you may return a creature card from your graveyard to the battlefield with a menace counter on it.

Tap an untapped land you control: Add one mana of any color. Activate only once each turn.
{2}{G}: Level 2
Whenever a land you control enters, create a Food token.
{G}: Level 3
When this Class becomes level 3, you may sacrifice a land. If you did, search your library for a land card, put that card onto the battlefield, then shuffle.

Choose up to three different kinds of counters on permanents you control. For each of those kinds, you may put a counter of that kind on a permanent you control that doesn't have one.
Draw a card.

Choose up to one for each color among red, green, and white among permanents you control.
• Target player creates a 2/2 red Berserker creature token with haste and “This creature can't block.”
• Creatures target player controls get +2/+0 until end of turn.
• Each creature you control deals damage equal to its power to target creature.

Penrath District enters tapped unless you control a Mountain, a Forest, and a Plains.
{T}: Add {R}, {G}, or {W}.

{T}: Add one mana of any color.
{1}{VP}{VP}{VP}, {T}, Sacrifice Petabyte Prism: Draw two cards.

Choose one. If your devotion to green is three or greater, you may choose another. The same is true for devotion to black.
• Create a 1/1 black Snake creature token with deathtouch.
• Creatures you control gain indestructible until end of turn.
• Prevent all damage that would be dealt to you this turn.

Choose one. If your devotion to blue is three or greater, you may choose another. The same is true for devotion to black.
• Target player mills eight cards.
• You gain 1 life for each card type among cards in your opponents' graveyards.
• Draw a card.

When Phenax's Touch enters, each opponent discards a card and loses 1 life.
{1}{B}, Sacrifice Phenax's Touch: You draw a card and you lose 1 life.

Exile the top two cards of your library. Until the end of your next turn, you may play those cards. Cards exiled this way cost {2} less to cast if they're instants, sorceries, or Elementals.

Enchant nonland permanent
Whenever a nonland permanent you control enters, if its mana value is greater than enchanted permanent's, exile enchanted permanent.

When Plasma Armory enters or leaves the battlefield, create a Weapon token.
{2}, Sacrifice Plasma Armory: Draw a card.

When Player Band enters, create a 2/3 colorless Bard creature token, then attach Player Band to it.
Equipped creature gets +1/+1.
{1}, Unattach Player Band: Tap equipped creature. It gains hexproof until end of turn.
Equip {3}

Each player mills two cards. When you do, return target creature card from your graveyard to your hand.

Enchant creature
Enchanted creature has “At the beginning of your upkeep, sacrifice a creature. If you can't, you lose 3 life.”

Poisoned Strike deals 3 damage to target creature. That creature's controller mills three cards.

Pool of Light enters tapped unless you control a basic Plains or a basic Island.

Choose target nonland permanent you control and up to two target nonland permanents you don't control. Return those permanents to their owner's hands.

Possibility Heights enters tapped.
{T}: Add {R} or {G}.
{T}, Discard another card named Possibility Heights: Draw a card.

Untap target non-Assembly-Worker artifact. Put a charge counter on it.

Until end of turn, target creature gains “When this creature dies, return it to the battlefield tapped under its owner's control and teach it flying.”