Clan Guildmage

Two guild-colored abilities, split cleanly along the axis Gruul cares about: red buys through a blocker, green manufactures a beater. The green half is the one with real ambition. Turning a land you control into a 4/4 with haste until end of turn conjures a threat from a resource that was already on the table doing nothing but tapping for mana, and the haste means it hits the same turn rather than announcing itself in advance. On the turns you leave it alone, it is still a land, so the cost of holding the option is nothing. The catch is the one every land-animation effect carries: a 4/4 land is a creature, and creature removal that would never have touched your manabase can suddenly eat one of your lands. Every activation of that ability converts a permanent resource into something a Doom Blade can answer. The red ability is the plainer of the two, stripping a chosen creature's ability to block so a bigger body gets through, and both abilities share the same tap, so they compete for the Guildmage's attention rather than combining on the same turn without outside help. That single tap is the real governor here: a two-drop that wants to activate every turn for the rest of the game, priced as a mana sink for a deck that floods rather than a tempo play for a deck that curves out.