2009-10-01 Call to Arms's third ability is a "state trigger." Once a state trigger triggers, it won't trigger again as long as the ability is on the stack
The pool of options for that slot is 20 Cocoons, 30 of the uncommons (65), 10 of the rares(52), and 7 mythics, a total of 67
You can gain two to put a 1/1 token into play and instantly attack an Equipment to them, and you can pay two loyalty to put an Equipment from your hand or graveyard into play
It is not as good a threat although it does offer some reach but given that it is also half the price, is playable in many more archetypes and is also a mana ramper and fixer The drawbacks of this card as life gain are that it is slow to get life returns from it, it will situationally not work for life when no dead guys are there to be exiled, it is reasonably easy to kill and it cannot give you a big single injection of life
Tekuthals indestructible cost may be one of the easiest to achieve with all the counters youll have lying around
Token decks can make the most of this card, with your creatures quickly spiraling out of control with the number of counters youll be dishing out to them