Pretty sure, after this and Oran-Rief Hydra we will get something like
Creature
2W (maybe 2R)
Creature
Landfall - Whenever a land enters the battlefield under your control, this creature gains first strike until end of turn. If that land is a plains (mountain for R), this creature gains double strike until end of turn instead.
2/3
Creature
2W (maybe 2R)
Creature
Landfall - Whenever a land enters the battlefield under your control, this creature gains first strike until end of turn. If that land is a plains (mountain for R), this creature gains double strike until end of turn instead.
2/3