Marjhan doesn't untap during your untap step.
, Sacrifice a creature: Untap Marjhan. Activate only during your upkeep.
Marjhan can't attack unless defending player controls an Island.
: Marjhan gets -1/-0 until end of turn and deals 1 damage to target attacking creature without
flying (This creature can't be blocked except by creatures with flying or reach.).
When you control no Islands, sacrifice Marjhan.