mtg.wtf

Flying
When Resolute Archangel enters the battlefield, if your life total is less than your starting life total, it becomes equal to your starting life total.

Artifact spells you cast have convoke.

You may have Mercurial Pretender enter the battlefield as a copy of any creature you control, except it has "{2}{U}{U}: Return this creature to its owner's hand."

Destroy all creatures you don't control and all planeswalkers you don't control.

Flying
At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature or pays 3 life.

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.

Flying
When Siege Dragon enters the battlefield, destroy all Walls your opponents control.
Whenever Siege Dragon attacks, if defending player controls no Walls, it deals 2 damage to each creature without flying that player controls.

When Phytotitan dies, return it to the battlefield tapped under its owner's control at the beginning of their next upkeep.

When Reclamation Sage enters the battlefield, you may destroy target artifact or enchantment.