Deathtouch
{X}{U}: This creature gets +X/-X until end of turn.

Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on it.

Whenever this Subroutine runs, search your library for a basic land card, put it onto the battlefield, then shuffle.

{X}{U}: Draw X cards. Activate only if this Subroutine ran this turn.

Choose one or both —
• Target creature gets +1/+1 until end of turn.
• Return target creature to its owner's hand.

Saboteur's Immolation deals 2 damage to each creature.
Cycling {2}

{2}, Sacrifice this creature: Create a 2/2 white Samurai creature token with exalted. Activate only as a sorcery.

Whenever you discard a nonland card, copy it. You may cast the copy without paying its mana cost.

{T}: Each player draws a card.
{1}, {T}: Each player draws two cards.
{2}, {T}: Each player draws three cards.

As this land enters, you may pay 2 life. If you don't, it enters tapped.
{T}: Add {B} or {R}.

Reach
When this creature enters, if you played a land from exile or cast a spell from exile this turn, it fights up to one target creature.

Sacrifice another creature: This creature gets +2/+1 until end of turn. Activate only once each turn.

Haste
This creature enters with a +1/+1 counter on it.
When this creature dies, you may put its counters on target creature you control.

When this enchantment enters, create a tapped Treasure token.
At the beginning of your upkeep, exile the top three cards of your library. Until end of turn, you may cast each of those cards by sacrificing a permanent in addition to paying their other costs.

Whenever a Subroutine you control enters, you may pay {2}. If you do, it runs.
Whenever a Subroutine you control runs, this creature gets +1/+1 until end of turn.

Flow — {4}{W}: Create a tapped 0/0 colorless Golem artifact creature token with “This creature gets +1/+1 for each artifact you control.”

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.
Cycling {2}

Whenever this enchantment or another nonland, nontoken permanent you control enters, if it wasn't cast, draw a card. You may put a land card from your hand onto the battlefield tapped.
Creatures you control with power or toughness 1 or less can't be blocked.

As an additional cost to cast this spell, exile three or more creature cards with different names from your graveyard.
Whenever this creature attacks, defending player chooses a card exiled with it. Put that card onto the battlefield under your control.

Haste
Mountaincycling {2}

Destroy target artifact.

Whenever you cast a noncreature spell, put a +1/+1 counter on this creature.

Enchant creature
Enchanted creature gets -3/-0.

Whenever you cast a multicolored spell, create a Treasure token.

Put a +1/+1 counter on target creature. It gains trample until end of turn.