Flash
When Eleanor, Royal Captain enters, target legendary creature gains indestructible until end of turn.
Cybersoul {5}{W/B}

At the beginning of combat on your turn, up to one target creature or Shrine gains deathtouch until end of turn. If you control three or more Shrines, other creatures you control also gain deathtouch until end of turn.

Flash
Enchant creature
Enchanted creature gets +0/+2 and has deathtouch.

Vigilance
Flow — {7}{W}: Tap all creatures target player controls.

When Ironback Tyke enters, you may search your library for a basic Mountain or Plains card, reveal it, put it into your hand, then shuffle.
{2}{R}{W}: Any number of target creatures you control have base power and toughness 3/3 until end of turn. If you control seven or more permanents with activated abilities, transform Ironback Tyke. Activate only as a sorcery.

When this artifact enters, you may search your library for a basic land card, reveal it, then shuffle and put that card on top.
{1}, Sacrifice this artifact: Draw a card.
{3}, Sacrifice this artifact: Exile each opponent's graveyard. Draw a card.

Whenever you sacrifice a permanent, double this creature's power until end of turn.
When this creature dies, create an X/X black Demon creature token, where X is this creature's power.

Enchant player
Enchanted player can't gain life.
At the beginning of your upkeep, enchanted player loses 1 life and you gain 1 life.

Deathtouch

Target creature gets +2/+0 and gains first strike until end of turn. If it's a Dragon, put a +1/+1 counter on it.

Level up {R/W}
[level 1-2] Whenever a nontoken creature you control with a counter on it dies, create a 1/1 white Citizen creature token.
[level 3+] Whenever a nontoken creature you control with a counter on it dies, create a 4/4 red Error creature token with menace.

Ninjutsu {2}{G}{U}
You may pay {0} rather than pay the ninjutsu cost of the first ninjutsu ability you activate each turn.

Dynamo Glyphs enters with six minus X charge counters on it.
Whenever a creature you control attacks, remove a charge counter from Dynamo Glyphs. Then if it has no charge counters on it, sacrifice it. If you do, draw three cards.

Whenever a creature dealt damage by Fleshbearer this turn dies, integrate that creature.
Fleshbearer gets +2/+0 and has menace as long as a creature card is integrated onto it.

Corrupt — Electronic Countermeasures deals 5 damage to target creature or planeswalker. If you control a permanent with greater mana value than this spell, exile the top X cards of your library, where X is the excess damage dealt this way. You may play those cards until your next end step.

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

Target player reveals their hand. You may choose a nonland card from it. If you do, that player discards that card. Otherwise, draw a card.

When this creature enters, mill two cards, then you may cache a permanent card from your graveyard.

Target creature you control gets +4/+3 until end of turn.

When Nocturne, Monstrous Krasis enters and at the beginning of your upkeep, put X +1/+1 counters on Nocturne, where X is the number of different kinds of counters on permanents you control.

At the beginning of combat on your turn, put a +1/+1 counter on equipped creature.
Equipped creature has flying as long as it has two or more +1/+1 counters on it.
Equipped creature has double strike as long as it has four or more +1/+1 counters on it.
Equip {2}

Choose one —
• Target creature gains hexproof until end of turn.
• Cache the top card of your library face down.

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

Solidarity
At the beginning of combat on your turn, target creature you control gets +2/+2, gains indestructible, and becomes an Avatar in addition to its other types until end of turn.

Exalted
{1}{W}, {T}: Tap target creature.