How powerful would these custom Magic cards be in Commander and Modern?

Shock and Awe UR

Instant - Rare

Return target creature to its owner's hand. Shock and Awe deals 3 damage to another target creature.

===

Maze U

Instant - Rare

Exile target creature with 3 Delay counters on it. At the beginning of your Upkeep, remove a Delay counter from that creature. When there are no Delay counters, return it to the Battlefield under its owner's control.

===

Pixie Pivot 1UG

Instant - Rare

As an additional cost to cast Pixie Pivot, tap an untapped creature you control

Counter target spell. Create two 1/1 Green Faerie Creature tokens with Flying.

===

Polymorph Rod 3

Artifact - Rare

2UU, Discard two cards, T: Exile target creature. Its owner creates a 1/1 White Rabbit Creature token.

===

Mind Meld UB

Sorcery - Rare

Target player chooses and discards two cards. For each Land card discarded this way, you Draw a card.

===

Nishryu 2BB

Creature - Spirit - Rare

First Strike.

When Nishryu deals combat damage to a player, that player discards a card at random.

BB: Mislead. (Exile Nishryu, then return it to the Battlefield.)

4/1

===

Double Cure GW

Instant - Rare

Prevent all combat damage which would be dealt to creatures you control this turn.

How powerful would these custom Magic cards be in Commander and Modern?
Post Opinion