For each attacking creature, its owner puts it on their choice of the top or bottom of their library.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Exile target attacking or blocking creature.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Glacial Crasher can't attack unless there is a Mountain on the battlefield.

Other Goblin creatures you control attack each combat if able.

At the beginning of combat on your turn, create a 1/1 red Goblin creature token with haste.

Whenever Goblin Rabblemaster attacks, it gets +1/+0 until end of turn for each other attacking Goblin.

Enchant creature

Enchanted creature gets +2/+2 and has vigilance. (Attacking doesn't cause it to tap.)

Other green creatures you control get +1/+1.

, : Another target green creature you control gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

First strike (This creature deals combat damage before creatures without first strike.)

Whenever Preeminent Captain attacks, you may put a Soldier creature card from your hand onto the battlefield tapped and attacking.

Flying

Vigilance (Attacking doesn't cause this creature to tap.)

Vigilance (Attacking doesn't cause this creature to tap.)

Warden of the Beyond gets +2/+2 as long as an opponent owns a card in exile.