If you have two dredge cards in your graveyard and one of these in play, you can replace your draw step with a dredge trigger, trigger the Skimmer, then replace that draw with your second dredge card
Whenever another nonartifact dork dies, you get it back face down as a tapped 2/2 Cyberman artifact dork
As a general rule, mana flood beats mana screw, so if you find yourself down to four cards, you may want to keep four lands
If your rival had responded to your Unsummon with another damage-dealing spell, your rival could have opted to have that last spell take effect before your Unsummon , giving your creature the deep-six
This means making sure that power outliers, especially gold ones, dont play well alongside one another