Given its efficiency, I doubt I will
You'll have to retreat out, or make use of that high HP total
It will also buff up any creature that enters the battlefield while its in play, and provides a ludicrous stream of card advantage since creatures entering will also draw you a card
A creatures converted mana cost is determined solely by the mana symbols printed in its upper right corner (unless that creature is the back face of a double-faced card, is a melded permanent, or is copying something else
(Equipment, Auras you control, and counters are modifications.) Cosmo Memory - When Red XIII enters, return target Aura or Equipment card from your graveyard to your hand
Scythecat's effect, placing a +1/+1 counter on a creature when a land enters and then doubling the number of counters on a second trigger, is pretty strong