Its upkeep trigger has the potential to take someone out if it goes off just once in the right situation, while the activated ability is fun since you can hate on graveyards and copy your opponents powerful creatures
For example, Restless Reef can mill four cards even if it attacks as a 2/2, and you can pay the to turn it into a 6/6 with deathtouch
With 36 lands, you have a 90.6% chance to draw 2 (or more) lands in your first 9 cards
Creatures they begin to control later in the turn won't lose power, toughness, or abilities
A 3/1 legendary Dinosaur Mutant for three mana, Indoraptor here has menace and bloodthirst X, meaning that it enters with a number of +1/+1 counters on it equal to the amount of damage dealt to your opponents this turn
A note about Counter Markers in MTG Counters are a fun mechanic in Magic, that modify the characteristics of an object or player