Some crewmates have extension effects that allow you to easily get enough bodies on field to make your plays
For example "During either player's turn, when your opponent activates a card or effect: You can negate the activation, and if you do, destroy that card." becomes "When your opponent activates a card or effect (Quick Effect): You can negate the activation, and if you do, destroy it." Also, avoid using this on Traps, as they are by default Fast Effects (Fast Effects means Spell Speed 2 and 3), so they can be activated in response to other effects
It gives your animated non-aura enchantments lifelink, deathtouch, and hexproof, so theyre both deadly and hard to remove
Alpha Deathclaw A 6/6 with Menace and Trample makes for a hard-hitting threat that is very difficult to completely block, befitting the Deathclaws dreaded reputation
Both cards are big, aggressive Dragons with haste