Keyword: Haste

Trample, haste
If you would put one or more counters on a permanent or player, put twice that many of each of those kinds of counters on that permanent or player instead.
If an opponent would put one or more counters on a permanent or player, they put half that many of each of those kinds of counters on that permanent or player instead, rounded down.

Flying, haste
Whenever Goldspan Dragon attacks or becomes the target of a spell, create a Treasure token.
Treasures you control have “, Sacrifice this artifact: Add two mana of any one color.”

Haste
Boast — : You may change Arni Brokenbrow’s base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Haste
Whenever Thraximundar attacks, defending player sacrifices a creature.
Whenever a player sacrifices a creature, you may put a +1/+1 counter on Thraximundar.

Flying, haste
Whenever an opponent casts their second spell each turn, draw a card.
Partner (You can have two commanders if both have partner.)

Haste
All creatures can attack your opponents and planeswalkers your opponents control as though those creatures had haste.

Flying, haste

Haste
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Deathtouch, haste
When Queen Marchesa enters the battlefield, you become the monarch.
At the beginning of your upkeep, if an opponent is the monarch, create a 1/1 black Assassin creature token with deathtouch and haste.

Trample, haste
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

Haste
Whenever Speedway Fanatic crews a Vehicle, that Vehicle gains haste until end of turn.

Haste
Whenever Bomat Courier attacks, exile the top card of your library face down. (You can’t look at it.)
, Discard your hand, Sacrifice Bomat Courier: Put all cards exiled with Bomat Courier into their owners’ hands.

Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.
Sacrifice another creature: Yahenni gains indestructible until end of turn.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you’re done activating mana abilities pays for .)
Trample, haste

Trample, haste
At the beginning of the end step, sacrifice Groundbreaker.

Haste (This creature can attack and as soon as it comes under your control.)
Other Goblin creatures you control get +1/+1 and have haste.

Haste
When Tuktuk the Explorer dies, create Tuktuk the Returned, a legendary 5/5 colorless Goblin Golem artifact creature token.

Flying, haste
When Hunted Dragon enters the battlefield, target opponent creates three 2/2 white Knight creature tokens with first strike.

Flying, vigilance, haste

Flying, haste
At the beginning of the end step, sacrifice Hell’s Thunder.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Kicker
This spell can’t be countered.
Hexproof, haste
If Cragplate Baloth was kicked, it enters the battlefield with four +1/+1 counters on it.

Trample, haste
Whenever Wayward Guide-Beast deals combat damage to a player, return a land you control to its owner’s hand.

Kicker
Trample, haste
If Shatterskull Charger was kicked, it enters the battlefield with a +1/+1 counter on it.
At the beginning of your end step, if Shatterskull Charger doesn’t have a +1/+1 counter on it, return it to its owner’s hand.

Trample, haste
Whenever Wayward Guide-Beast deals combat damage to a player, return a land you control to its owner’s hand.

Kicker
Trample, haste
If Shatterskull Charger was kicked, it enters the battlefield with a +1/+1 counter on it.
At the beginning of your end step, if Shatterskull Charger doesn’t have a +1/+1 counter on it, return it to its owner’s hand.