Metallurgic Summonings requires you to invest a hefty five mana without effect, but once you untap, it's effect can quickly take over games
The downside is that you cant touch Progenitus either, but does that really matter when you can shut down the game in a swing or two
Basically it allows you to cast Wrath of God with a massive board state, then it returns to the battlefield due to its Persist ability, then you get all of your things back while all of your opponents sob uncontrollably
To start with, lets take a look at a very basic use of Archangel Avacyn: Creatures (30) 4 Knight of the White Orchid 2 Anafenza, Kin-Tree Spirit 4 Dragon Hunter 3 Kytheon, Hero of Akros 3 Consul's Lieutenant 4 Expedition Envoy 2 Archangel Avacyn 4 Thalia's Lieutenant 4 Town Gossipmonger Lands (22) 20 Plains 2 Westvale Abbey Spells (8) This is an Archangel Avacyn deck
1 Sting, the Glinting Dagger
That 10% mint rateamong the lowest everstems from the cards circular foil overlapping borders