First strike
Whenever Mirri attacks, each opponent can't block with more than one creature this combat.
As long as Mirri is tapped, no more than one creature can attack you each combat.

Whenever a creature you control with a +1/+1 counter on it leaves the battlefield, create a Mutagen token for each +1/+1 counter on it. (A Mutagen token is an artifact with ", , Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")
: Exile target card from a graveyard. Create a Mutagen token.

Whenever a creature you control is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

All lands become 2/2 creatures until end of turn. They're still lands.

Players can't cast spells that share a color with the spell most recently cast this turn.

, : Draw a card. Activate only if you control three or more lands with the same name.

: Destroy target Aura attached to a creature.

Whenever an opponent draws a card, this enchantment deals 1 damage to that player.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)
, Remove two +1/+1 counters from among creatures you control: Destroy target artifact or enchantment.

When this creature dies, create a 4/4 red Bird creature token with flying at the beginning of the next end step.

Constellation — Whenever this creature or another enchantment you control enters, double target creature's power and toughness until end of turn.

Lightning Bolt deals 3 damage to any target.

If a triggered ability of a colorless spell you control or another colorless permanent you control triggers, that ability triggers an additional time.
Whenever you cast a colorless spell, copy it. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

Target opponent chooses a creature they control. Other creatures they control can't block this turn.

Whenever you draw a card, exile the top card of your library face down.
At the beginning of your upkeep, you may exile all cards from your hand face down. If you do, put all other cards you own exiled with this artifact into your hand.

Changeling (This card is every creature type.)
This creature can't block and can't be blocked.

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.)
Trample
Heavy Power Hammer — Whenever this creature deals combat damage to a player, destroy target artifact or enchantment that player controls.

Other Goblins you control get +1/+1.
, : This creature deals damage equal to the number of Goblins that entered the battlefield under your control this turn to any target.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip

Choose one —
• Draw cards equal to the greatest power among non-Human creatures you control.
• Non-Human creatures you control get +3/+3 until end of turn.