Shadowverse

Sword officer. Enhance 6, gain 3+/3+ and ward.

at the end of your opponent's turn, perform necromancy 4 summon a zombie

When this card attack, deal 2 damage to random other allied follower. If you don't have any other follower, deal 2 damage to your leader instead.

This sword guy is decent enough for a casual game.
The necromancer is not bad, but on the other hand, it won't let you accumulate shadows for something more substantial.
Gold, it seems, is a Blood type. Again, self-damage, and it might leave you without ward, which is not ideal. I don't like such cards.
Update: I heard that this gold card is... Heaven? O_______________O



As I wrote above, it will give you a free win. I can't even imagine in theory what benefit it could have. Although I'm saying this as a staunch Discard hater, but still.

On the official website, they added some cards, including that rat that the spell transforms into. It's a very questionable follower that can easily do more harm than good. Imagine, for example, that after this spell, the mage is left with, say, 10 HP, while the opponent has a full board of these followers and, say, 6 HP. That's terrible, right?