The range of things this can do boggles the mind, especially when you factor in eternal formats and Commander
The gist of it is: An alternative cost replaces the spells mana cost
Starting out as turn-based RPGs, the main series switched to first person, more action oriented role playing with Bethesdas Fallout 3 back in 2008 and has remained in the same style, even for MMORPG Fallout 76, ever since
His power and toughness scale dynamically with the number of noncreature tokens you control, which can be bolstered by his own ability and that of Sarah Jane Smith
Its certainly a source of income, but for a lot of artists, its worth it in other ways, as well
Najeela Stax struggles with card advantage on account of having none in the command zone