Landroval

Cumulative upkeep {u}{r/w} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Flying (This creature can't be blocked except by creatures with flying or reach.)
If Landroval would leave the battlefield, shuffle
it into its owners library instead; you may return
X target creature to their owner's hand where X
is the number of age counters on Landroval.