Tejedora de brasas (Ember Weaver)
Tejedora de brasas 

Mientras controles un permanente rojo, la Tejedora de brasas obtiene +1/+0 y daña primero.
Texto de reglas (Oracle, inglés)
As long as you control a red permanent, this creature gets +1/+0 and has first strike.
"Cada noche el sol se desenrolla y pierde con el viento. Cada día, las arañas arman uno nuevo en el cielo." —Mito de los siembrasol
Legalidad
Aclaraciones de reglas (en inglés)
2009-02-01
As long as at least one permanent you control is the specified color, the ability will "work" and grant this creature the bonus. Otherwise, it won't have the bonus.
2009-02-01
Whether Ember Weaver has first strike matters only at the point that the normal combat damage step would begin, and only if there hasn't already been a first-strike combat damage step that turn. If any of your creatures has first strike at that point, a first-strike combat damage step is created. -- If Ember Weaver has first strike at that point, it will assign and deal combat damage during that step (even if it loses first strike before that damage is dealt) and it won't deal combat damage during the normal combat damage step. -- If Ember Weaver doesn't have first strike at that point, it will assign and deal its combat damage during the normal combat damage step (even if it gains first strike before then).


