Enchant creature Enchanted creature doesn't untap during its controller's untap step. Enchanted creature has "{1}, Put a -1/-1 counter on this creature: Untap this creature."
Until end of turn, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead. Exile Sins of the Past.
{G}: Target creature blocks Sisters of Stone Death this turn if able. {B}{G}: Exile target creature blocking or blocked by Sisters of Stone Death. {2}{B}: Put a creature card exiled with Sisters of Stone Death onto the battlefield under your control.
As Six-y Beast enters, you secretly put six or fewer +1/+1 counters on it, then an opponent guesses the number of counters. If that player guesses right, sacrifice Six-y Beast after it enters.
{R}{G}: Creatures you control gain trample until end of turn. {1}{R}{G}: Target land you control becomes a 4/4 Elemental creature until end of turn. It's still a land.