Gambling with the Past

When Gambling with the Past attacks, roll
a D6. If the result is:
1: Sacrifice Gambling with the Past
2-3: Gambling with the Past gains Lifelink
4-5: Gambling with the Past gains Lifelink
and Unblockable
6: Gambling with the Past gets +4/+4
and gains Lifelink and Unblockable
until end of turn
I go all-in