You can pull off those counters for three cards, and if you managed to give it another counter, then you can keep it around (although I think it's better when you kill it)
Banner of Kinship Banner of Kinship can provide Coat of Arms levels of board pump, sometimes enough to end the game on the spot, but it also has the failcase of being a complete blank if you have no creatures in play already
If you never complete the Tomb of Annihilation, you can continuously bounce and recast the lich
Creatures of unspeakable terror, beings whose very visage can turn the mind of the strongest mage
Note that while it is the source of damage for its activated ability, it won't be on the battlefield as that ability resolves and its first ability won't increase the damage it deals
Archetype, mechanic, or theme - The second part either describes the strategy 'archetype' it uses to win games (e.g