The Ring of Sylphis

Hexproof
All creatures under your control have haste and RingLandfall.
RingLandfall — whenever a land card enters the battlefield under your control, put a +1/+1 on all creatures under your control until end of turn.
{w}{w}{w}: put a -1/-2 on The Ring of Sylphis. All creatures under your control gain vigilance when they enter the battlefield.
{t}, {4}{w}{w}: all creatures under your control get menace until end of turn.