NephilOrb WalkeRyS

While it is Day, NephilOrb WalkeRyS has
Vigilance.
While it is Night, NephilOrb WalkeRyS has
Menace.
Orb Core - Whenever NephilOrb WalkeRyS
attacks, it gets +X/+0 until end of turn,
where X is either the amount of life you gained
this turn or the amount of life target opponent
lost this turn, whichever is greater.