Trample
Whenever Arena Champion attacks, create a Weapon token, then attach it to an attacking creature you control.

Flying, haste
When Chainbreaker's Familiar enters, exile target instant or sorcery card from your graveyard. You may cast a copy of that card until the end of your next turn.
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, you may return Chainbreaker's Familiar from your graveyard to your hand.

When Coercive Contractor enters, create a Treasure token.
{X}, {T}, Sacrifice a Treasure: Gain control of target nontoken creature with mana value X until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery.

Haste
Whenever a player casts a spell, if no mana from a basic source was spent to cast it, Flaw in the System deals 2 damage to that player.

Whenever you amp it up, Fraying Gearhead gets +1/+0 and gains first strike until end of turn.

Haste
Whenever you cast a spell that targets Glint-Glyph Oracle, you may discard a card. If you do, draw two cards if Glint-Glyph Oracle is attacking or draw a card otherwise.

At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, put a +1/+1 counter on Goldrune Scribe.

Reach
{VP}{VP}{VP}: Laser Technician deals 1 damage to target player, planeswalker, or creature with flying.

Solidarity
When Minoan Engineer dies, create a 1/1 colorless Thopter artifact creature token with flying.

Whenever a creature you control becomes a Rebel, creatures you control get +1/+0 until end of turn.
{2}{R}: Mob Instigator dares 4.

Mogis's Raider has first strike as long as it is attacking.
When Mogis's Raider enters, bless target creature.

As Prodigious Hater enters, look at an opponent's hand, then choose a nonland card name.
Whenever an opponent casts a spell with the chosen name, Prodigious Hater deals 3 damage to that player.

Flashback costs you pay cost {2} less.
{R}, {T}, Discard a card: Draw a card.

Whenever you cast an instant or sorcery spell, choose one that hasn't been chosen this turn —
• Create a 1/1 colorless Construct artifact creature token.
• Discard a card, then draw a card.
• Add one mana of any type.

Trample
When Seismic Chimera enters, bless target creature.

Whenever you gain control of a permanent you don't own or a permanent you don't own enters under your control, put a +1/+1 counter on Vagrant Sorceress.

Trample
{2}{R}: Vengeful Mother gets +2/+0 until end of turn.

Whenever you cast an artifact spell, create a 0/0 colorless Robot artifact creature token with a +1/+1 counter on it.
{2}, {T}: Add {R} for each artifact you control. Spend this mana only to cast artifact spells or activate abilities of artifacts.

Ward—Pay 2 life.
Whenever Zygos attacks, bless target legendary creature you control.

When Alrantan Visionary enters, reveal the top three cards of your library. Put a noncreature permanent card from among them into your hand and the rest into your graveyard.
{T}: Add one mana of any color.
Wander {4}{G}{G}

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

When Caller of Ferocity enters, bless target creature.

Whenever Disciple of the Weavers attacks, if you control another creature with power 4 or greater, Disciple of the Weavers can't be blocked by creatures with power 2 or less.
Whenever Disciple of the Weavers deals combat damage to a player, put a +1/+1 counter on it.

{VP}{VP}{VP}: Put a +1/+1 counter on Frequency Omnivore.

Whenever Grazing Yaks becomes tapped, if you have at least 3 life more than your starting life total, put a +1/+1 counter on it.
{T}: You gain 1 life.