Opportunity

Destroy two target artifacts.

1U, T: Put target green creature on top of its owner's library.

Echo 3W (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, you gain 5 life.

Target creature gets +0/+4 until end of turn. Cycling 2 (2, Discard this card: Draw a card.)

Flying, protection from black Echo 3WW (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, return target creature card from your graveyard to the battlefield.

Echo 4 (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) You may choose not to untap this artifact during your untap step. 2, T: All creatures get +2/+2 for as long as this artifact remains tapped.

Target opponent reveals their hand. You choose a creature card from it. That player discards that card.

Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it.