Stroke, Well of Rotting Time

All non-land permanents you control enter the battlefield with a phasing counter.
{1}{w} Target permanent without the following
ability gains: "Whenever this card phases in,
trigger any enter-the-battlefield effects it has."
{1}{b} Target permanent without the following
ability gains: "Whenever this card phases out,
trigger any leave-the-battlefield effects it has."
{1}{u} Remove a phasing counter from target permanent.