Chain Stasis
Instant
You may tap or untap target creature. Then that creature's controller may pay 
. If the player does, they may copy this spell and may choose a new target for that copy.
"Here we go again." —Kakra, Sea Troll
Pat Lewis
Homelands (HML)
• #23Rulings
The spell copy has all the text and can result in itself being copied.
(wotc • 2004-10-04)
The decision to tap or untap is made on resolution of the spell (and of each copy).
(wotc • 2004-10-04)
Paying to make Chain Stasis continue is done as part of the resolution of the spell.
(wotc • 2004-10-04)
The player putting the copy spell on the stack controls that spell.
(wotc • 2004-10-04)
The copy is a spell, so it can be targeted by other spells and abilities that target a spell.
(wotc • 2004-10-04)
Rulings
The spell copy has all the text and can result in itself being copied.
(wotc • 2004-10-04)
The decision to tap or untap is made on resolution of the spell (and of each copy).
(wotc • 2004-10-04)
Paying to make Chain Stasis continue is done as part of the resolution of the spell.
(wotc • 2004-10-04)
The player putting the copy spell on the stack controls that spell.
(wotc • 2004-10-04)
The copy is a spell, so it can be targeted by other spells and abilities that target a spell.
(wotc • 2004-10-04)