At its core, Tin Fins is a
Reanimate
or deck. It's trying to get Griselbrand into play as fast as possible with Entomb,
Thoughtseize
,
Cabal Therapy
to get him in your graveyard. Then reanimate him with haste with either
Shallow Grave
or Goryo's Vengeance.
Once Griselbrand is in play, you can then activate his ability which says: Pay 7 Life, draw 7 cards." You can activate this twice at 20 life. Which loses you 14 life, but draws you 14 cards.
You are aiming for a Children of Korlis, Entomb +
Shallow Grave
/
Reanimate
. As well as some mana in the form of Lotus Petal,
Dark Ritual
or
Chrome Mox
.
If you didn't draw any of those, you can attack with Griselbrand, because Goryo's Vengeance and
Shallow Grave
give him haste. Which you would then pay 7 more life to draw 7 more cards. Making it so you've lost 21 life this turn.
Once you do draw what you need, you then cast the Children of Korlis, or get it into play with a
Reanimate
effect. Once it's in play, you sacrifice it for its own ability. Which says "You gain life equal to the life you've lost this turn." Since you either lost 14 or 21 life. You then gain that much back.
Which then allows you to activate Griselbrand's ability again. To draw up either 7, 14, or 21 more cards at the cost of either 7, 14, or 21 more life. Which at max, will make it so you've drawn 42 cards this turn and lost 42 life this turn. At which point it's child's play to get a second Children of Korlis into play to sacrifice then gain ALL the life you've lost this turn back. At most, it would be 42 life. This is cumulative and checks all the life you've lost this turn, from any means.
Because you've drawn so many cards, you will likely have a number of Lotus Petals and
Dark Ritual
s in hand. This will allow you to gain a lot of mana.
So now that you know the basis, lets talk about how it goes infinite.
Once you have drawn the majority of the cards in your deck, you're going to cast either
Cabal Therapy
, or
Thoughtseize
targeting yourself in an attempt to discard
Emrakul, the Aeons Torn
in order to shuffle your graveyard back into your library. But first want to make sure that the amount of cards in your graveyard and library, +2 (the discard spell + Emrakul, the Aeons Torn) is evenly divisible by 7 (Griselbrand's activated ability). This will allow you to draw your deck, if it's a multiple of 7. You may have to use another Lotus Petal and Children of Korlis in order to draw it all. But once your deck is in your hand, you will be able to gain infinite life, mana, and storm count.
You do this by having 0 cards in your graveyard and library, with your deck in your hand. You then cast the 4 Lotus Petals that are in your hand. You activate their ability producing . You then cast Chrildren of Korlis with the . You sacrifice it to gain a bunch of life. You then cast either
Cabal Therapy
, or
Thoughtseize
with the with one of the , targeting yourself. You then discard
Emrakul, the Aeons Torn
to shuffle your graveyard into your library. Which will leave your deck as 4 Lotus Petal, 1 Children of Korlis, 1
Emrakul, the Aeons Torn
and 1 Cabal Therapy or
Thoughtseize
. Which is 7 cards. You then activate Griselbrands ability to draw those 7 cards and repeat. You can then establish a loop and after a while you can do the loop but making different mana with the 4 Lotus Petals instead. Which will give you infinite mana of every color, infinite life, because with each loop Children of Korlis is gaining you more and more life each time, and an infinite storm count.
You then just cast a new Griselbrand, and the old one will go into your graveyard because of the legend rule. You then cast another
Cabal Therapy
, or
Thoughtseize
to discard Emrakul, the Aeons Torn. Which will shuffle those 3 cards into your deck. Then you cast Ponder LRW) and because you only have 3 cards in your deck, you can guarantee you draw the Emrakul, the Aeons Torn, hard cast it with your infinite mana, get an extra turn and attack!