Solidarity
Whenever Battlehymn Howler attacks, add an amount of {G} equal to its power. Until end of turn, you don't lose this mana as steps and phases end.

Whenever a land card is put into your graveyard from anywhere, Bearer of Autumn gets +1/+1 and gains trample until end of turn.

Flying
Whenever you amp it up, create a 1/1 colorless Servo artifact creature token.

Flash
Ward {3}
You may reveal the second card you draw each turn as you draw it. When you do, you may cast it without paying its mana cost. If you didn't cast a spell this way, create two Treasure tokens.

At the beginning of combat of your turn, Belief-Belying Beast gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Ruins you control can't be blocked by creatures with power 2 or less.
{1}, {T}: Put a +1/+1 counter on target Ruin.
Spellcharge 5

Flash
When Benthalos of Land and Sea enters the battlefield, you may pay {X}. When you do, create a token that's a copy of target white or blue enchantment you control with mana value X or less.

Flash
When Blightfang Zyxthax enters the battlefield, discard a card. If you do, it gains deathtouch until end of turn.

Ward {X}, where X is the number of differently named lands you control.

Menace, first strike
Exile a card from your graveyard, Pay 1 life: Add {C}. Spend this mana only to cast an instant or sorcery spell.

Vigilance
Other creatures you control with vigilance get +1/+1.
Whenever one or more creatures with vigilance you control attack, you may tap target creature.

Flying
Whenever another creature enters the battlefield under your control, you may have Bravewing Hero dare 2.

Haste
Whenever you amp it up, put a +1/+1 counter on Breakbot. It gains first strike until end of turn.

{VP}{VP}{VP}, Sacrifice Bright-Lights Terrier: Creatures you control gain indestructible until end of turn.

Flying
Whenever Capital Skyraiders deals combat damage to a player, integrate the top card of that player's library.
Capital Skyraiders gets +3/+3 as long as four or more cards are integrated onto it.

Trample
Whenever Carlacio, Riot Instigator attacks, you may have another target attacking creature you control dare X, where X is Carlacio's power.

When Carving Instructor enters the battlefield, put a flying counter on target creature you control.

Flying
Indulgence
Whenever you indulge, you may return target creature card from your graveyard to your hand.

Each player can't cast more than one spell or activate more than one activated ability that isn't a mana ability each turn.

Trample
When Centaur Mentor enters the battlefield, target creature gets +X/+0 until end of turn, where X is your devotion to green.

Vigilance
Whenever Cerys attacks, you may return a nontoken permanent you control to its owner's hand. If you do, create two 1/1 red Soldier creature tokens that are tapped and attacking.

Whenever Chamille, AAA-Lister attacks, target nonlegendary creature can't block it this turn.
Whenever Chamille deals combat damage to a player, put a +1/+1 counter on it, then create a Treasure token for each counter on it.

{4}{W}, Exile Charging Brightmare from your graveyard: Bless target creature. Activate only as a sorcery.

Flying
When Charming Siren leaves the battlefield, if it wasn't blocking, you may bless target creature.

Whenever Claes, Shield of Karda attacks, another target attacking creature you control gains indestructible until end of turn.
Whenever a planeswalker enters the battlefield under your control, you may exile Claes, then return him to the battlefield transformed with a number of loyalty counters on him equal to the starting loyalty of that planeswalker.