As long as you cast a lot of cheap instant and sorcery cards early-game, its huge initial cost of 10 colorless mana is reduced by one for each of those cards in your graveyard
Im not talking about Siege Rhino, where the stats are just off the charts
End Game When your opponent plays a Character with [Blocker] or other troublesome effects, it's time for "OP09-093 Marshall.D.Teach" to shine
For example, Sokka has three separate cards, with Tenacious Tactician having access to Jeskai (blue-red-white mana) coloured spells, where the previous two versions (where the story is concerned) only have access to two colours of mana
If they manage to deal with your 7/10 or you blink it, more lands will hit the bin
II, III Double the number of each kind of counter on target creature you control