Activate Ashnod's Altar by sacrificing Rhovanion Rampager, adding .
When Rhovanion Rampager dies, it creates a creature token with at least three counters on it, including a vigilance counter due to Tayam.
Activate Tayam by paying 3 and removing one counter from the creature token and two counters from other creature you control, milling three cards and returning Rhovanion Rampager from your graveyard to the battlefield with a vigilance counter on it.
Activate Tayam again by paying 3 and removing a vigilance counter from Rhovanion Rampager and two counters from the creature token.
Holding priority, activate Ashnod's Altar twice by sacrificing Rhovanion Rampager and the creature token, adding .
When Rhovanion Rampager dies, it creates a creature token with at least three counters on it, including a vigilance counter due to Tayam.
Resolve Tayam's ability, milling yourself three cards and returning Rhovanion Rampager from your graveyard to the battlefield with a vigilance counter on it.