As the number of cards you can use during a turn is only limited by the amount of mana you have in your pool (compared to the summoning limits of a game like Yu-Gi-Oh!), Black Lotus could allow a player, especially one playing an aggressive Red mana deck, the opportunity to destroy their opponent with zero ability to be countered
Tourach, Dread Cantor Tourach, Dread Cantor is a powerful threat that sees Modern play, and it can be a nice commander too
Amber cards in Rise of the Floodborn, the latest set for trading card game Disney Lorcana, are ideal for players who enjoy synergy
Carrion Feeder works as a great sacrifice outlet and is an amazing combo material
If the card you're adding is a five drop, try to take a five drop out
Sometimes, this is a common or uncommon with extended art