Most of the time you're going to be gaining 1-2, maybe three life a turn, which isn't nothing, but probably not enough to be super relevant to the game
Whenever you roll C, create a 1/1 green Ooze creature token that comes into play with X +1/+1 counters on it, where X is equal to the highest power among creatures you control
All Slivers have "When this permanent enters, draw a card." Creature - Sliver Color tag templates(None) Glasspool Mimic You may have this creature enter as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types
Exiling artifacts and enchantments is an example of something that can be absolutely critical in some games and completely worthless in others, so it made a perfect candidate for a basic landcycling card
As this method is somewhat tedious, I have only analyzed the uncommons of three sets so far: Gym Heroes, Neo Destiny and Expedition (despite this set only having two uncommons per pack, it seems to have worked out since there are not many repeated sequences)
If you add the Donquxiote Doflamingo Leader from Romance Dawn , this deck even becomes tier one