Echo Chamber

: Create a token that's a copy of target artifact. That token gains haste. Exile it at the beginning of the next end step.

, : Target creature you control gets +2/+2 until end of turn. Return it to its owner's hand at the beginning of the next end step. (Return it only if it's on the battlefield.)

: Add .

, : Target creature gets +1/+1 and gains flying until end of turn. Activate only as a sorcery.

, : Target creature you control gets +X/+X until end of turn. Destroy it at the beginning of the next end step.

When Eriette's Tempting Apple enters, gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.

, , Sacrifice Eriette's Tempting Apple: You gain 3 life.

, , Sacrifice Eriette's Tempting Apple: Target opponent loses 3 life.

, , Exile a creature card from your graveyard: Create a token that's a copy of the exiled card, except it's a 0/0 Construct artifact in addition to its other types and it has "This token gets +1/+1 for each Construct you control." It gains haste until end of turn. Activate only as a sorcery.