2UURR
Creature - Gorgon Cleric (1/2)
T: put a doom counter on target artifact
Each land with a doom counter on it gains ''When ~this~ is put into a graveyard from the battlefield, regenerate target attacking or blocking creature''
UBR, Sacrifice ~this~: you may return a white creature card from your graveyard to the battlefield

---

4
Creature - Bird (3/3)
Flying
As long as the amount of mana in your mana pool is 4 or less, ~this~ is unblockable

---

GWU
Creature - Spirit (3/3)
When ~this~ is put into a graveyard from the battlefield, target player reveals cards from the top of his or her library until that player reveals a artifact card, puts that card into play, and shuffles the rest into his or her library.

---

AlexChurchill/MagicCardGenerator