mtg cards that return from exile Recall #MtgLegends Discard X cards, then a card from your graveyard to your hand for each card discarded this way. Recall. #MtgBlue lets you bring back stuff from Mint / near mint condition trading card Do You Know All 3

Unclear if Ichor Wellspring is a bit too slow for Standard but seems like it should be good enough

While Mox Amber does require you to have a legendary creature or planeswalker in play to add mana, given the nature of Commander and the huge number of legendary creatures and planeswalkers Magic has been printing lately, it is very easy to activate

It is beyond powerful

The Lorcana starter decks provide counters and mats for these purposes, but you can use any method you like as long as it's been agreed with your opponent

Zopandrel, Hunger Dominus If you can survive till turn seven and have a decent board, Zopandrel is guaranteed to end the game in short order

Plus, that art is too much fun to leave unsleeved