Put target attacking or blocking creature on top of its owner's library.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Whenever a permanent enters the battlefield tapped and under your control, untap it.

, : Target creature gets -2/-0 until end of turn.

As Ashling's Prerogative enters the battlefield, choose odd or even. (Zero is even.)
Each creature with converted mana cost of the chosen value has haste.
Each creature without converted mana cost of the chosen value enters the battlefield tapped.

Auntie's Snitch can't block.
Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)
Whenever a Goblin or Rogue you control deals combat damage to a player, if Auntie's Snitch is in your graveyard, you may return Auntie's Snitch to your hand.

At the beginning of combat on your turn, you may have target creature get +2/+0 until end of turn.

Flying
Haunt (When this creature dies, exile it haunting target creature.)
When Blind Hunter enters the battlefield or the creature it haunts dies, target player loses 2 life and you gain 2 life.

Whenever another Goblin you control is put into a graveyard from the battlefield, you may have Boggart Shenanigans deal 1 damage to target player or planeswalker.

Changeling (This card is every creature type.)
Haste
Champion a creature (When this enters the battlefield, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

Conflagrate deals X damage divided as you choose among any number of targets.
Flashback—, Discard X cards. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Creatures your opponents control get -1/-0.

Sacrifice Cursecatcher: Counter target instant or sorcery spell unless its controller pays .

Enchant creature
: Put a +1/+1 counter on enchanted creature.

Reach (This creature can block creatures with flying.)
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Destroy target land. You gain 2 life.

Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)
When Earwig Squad enters the battlefield, if its prowl cost was paid, search target opponent's library for three cards and exile them. Then that player shuffles their library.

Whenever you clash, tap target creature an opponent controls. If you won, that creature doesn't untap during its controller's next untap step. (This ability triggers after the clash ends.)

Flying

Flying
At the beginning of your upkeep, return an artifact you control to its owner's hand.