First, you either need a creature thats being targeted by removal, or you need a sacrifice outlet
Giving the creature +1/+1 is great too since, the lingering effects of Maximum Overdrive help scale your creatures higher and higher
With a simple tap, it lets you bring your zombie friends back from the graveyard for another round, and its ward tax of 2 life is annoying against targeted removal
This covers the middle of the second pack and most of the third pack, when its unlikely youll be switching
When he is readied during a turn, if the player has two or more glimmers in play, they gain 2 Lore points
The main concepts you should be aware of are having enough lands in your deck and how much mana the cards in your deck cost