Steve the Explorer

{t}: Return Steve the Explorer to his owners hand.
Cumulative upkeep {w} (At the beginning of your upkeep, if Steve the Explorer is on the battlefield, put an age counter on Steve the Explorer. Then you may pay {w} for each age counter on it. If you don't, sacrifice it.)
Whenever a land enters the battlefield under
your control, gain X life where X is the number
of age counters on Steve the Explorer.