I have way too many decks already, so I generally just switch decks between games if I'm looking for a different play pattern or strategy
A 2/2 Legendary creature Human Cleric with lifelink that costs two generic and one white mana, whenever you gain life you place a +1/+1 counter on Aerith Gainsborough
Two of the heaviest hitters in this deck are Hullbreaker Horror and Coat of Arms
Coffin Purge and Purify the Grave still don't seem worth the inclusion, while Memory's Journey looks pretty interesting as an enabler for baron-esque decks and incidental gy hate.
Unlike other sources of ramp, like creatures or artifacts that tap for mana, lands are very difficult to remove from the battlefield, and unlike temporary ramp, like Dark Ritual, extra lands continue to provide an advantage turn after turn
When this Siege enters, exile cards from the top of your library until you exile two nonland cards with mana value 4 or less