The goal of this archetype is to flood the board with small, cheap creatures that you can buff for big, early swings
Once it absorbs enough light, it can undergo a process called Ultra Burst to reclaim its true form: Ultra Necrozma
A powerful Chaos card, Druiswurm can summon itself by banishing a Light or Dark monster in either player's graveyard to special summon itself
Cards such as Merlin, Goat and Madam Mim, Fox trigger their effects as they enter or leave play, requiring a bit more forethought in when to play them to make the most of their magical powers
When any typed creature enters, if its power is 4 or greater, you can pay mana to have Slinza fight another creature you dont control, acting as a form of removal
The cost reduction applies only to generic mana in the total cost of black spells you cast