Lifelink
Level up—{1}, Pay 4 life.
[level 1-4] Lifelink
Whenever you gain life, draw a card.
[level 5+] Lifelink
Whenever you gain life, draw that many cards.

{T}: Add {R}{R}{R}. Spend this mana only to cast creature spells. If that mana is spent on a creature spell, it enters with an additional haste counter and decayed counter on it.

Vigilance, ward {1}
Whenever Lio or another enchantment creature you control enters, put a +1/+1 counter on that creature. You gain 1 life and draw a card.

Destroy target creature or planeswalker. Its controller creates a Treasure token.

Flash
Flying, lifelink
Your opponents can't create tokens.

Kraken, Leviathan, Octopus, and Serpent spells you cast cost {X} less to cast, where X is your devotion to blue.

When Lost Resistor dies, you gain 1 life.
Cybersoul {X}{X}{W}

Create X blue Shrine enchantment tokens named Unmarked Shrine with “At the beginning of your upkeep, each opponent mills a card.”
{1}{U}, Exile Lost to Memory from your graveyard: Draw two cards. Activate only if an opponent has eight or more cards in their graveyard.

Luraana enters tapped with twelve stun counters on it.
When Luraana enters, until your next turn, you may cast spells as though they have flash.
Untap all permanents you control during each other player's untap step.

Integrate the top two cards of target player's library. They lose 2 life, and you gain 2 life.
Whenever a permanent you control with two or more cards integrated onto it dies, you may pay {B}. If you do, return Lure into Lunacy from your graveyard to your hand.

{1}: Untap Magnetling.
{1}: Magnetling can't be blocked by creatures with power 2 or less this turn.
{1}: Choose a card type. Magnetling loses that type until end of turn.
{1}: Magnetling gets +1/-1 or -1/+1 until end of turn.

Flow — {3}{U}: Copy target triggered ability you control. You may choose new targets for the copy.

Whenever you cast a spell with mana value 4 or greater, create a 4/3 red and green Spirit Beast creature token.
Whenever a creature you control deals 4 or more damage to a player, draw a card. This ability triggers only once each turn.

Each opponent separates the creatures they control into two piles. For each opponent, you choose one of their piles. Each opponent sacrifices the creatures in their chosen pile.

{2}, {T}: Exile target creature you control, then reveal the top card of your library. If the revealed card is a creature card, put it onto the battlefield. Otherwise, return the exiled card to the battlefield under its owner's control.

Flying
When Malicious Skycleaver enters, pay any amount of life. It deals that much damage to each other creature.
Cybersoul {7}{B}{B}

Sacrifice a Treasure: Put a loyalty counter on Marilye, Dreaming Big.
[+1]: Draw a card, then discard a card. If you discarded a nonland card this way, create a tapped Treasure token.
[–3]: Gain control of target artifact. It becomes a Treasure artifact, loses all other types, and loses all abilities except for activated mana abilities.
[–8]: Target opponent chooses a nonland permanent they control. You gain control of the rest.

You lose life equal to the number of cards you've drawn this turn, then draw a card. You may repeat this process any number of times.

Double strike
Whenever an enchantment you control enters, you may create a token that's a copy of it, except the token isn't legendary and has exalted. Do this only once each turn.

Whenever you cast a noncreature spell, put an exalted counter on this enchantment.
Whenever a creature you control attacks, draw X cards if its power is greater than 7, where X is the difference.

Matter Harvester has protection from mana values less than the number of artifacts you control.
Whenever a nonland permanent you don't control leaves the battlefield, create a 1/1 colorless Cyborg artifact creature token.

This land enters tapped unless you control one or fewer other lands.
{T}: Add {R} or {G}.
Cycling {2}

When Mellan, Defense Attorney enters, make a pledge.
{T}: Choose a color from among other permanents you control. Another target creature you control gains hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn.

Whenever this creature deals combat damage to a player, create an X/X colorless Construct artifact creature token, where X is 1 plus the number of counters on this creature.
{1}, Sacrifice an artifact or enchantment: Put a +1/+1 counter on this creature. It gains trample until end of turn.

When Menelaia enters, put a +1/+1 counter on up to two target creatures.
{1}, Remove a +1/+1 counter from another creature you control: That creature gain indestructible until end of turn. Tap it.