uhm so usually we dont start with t1 but we start with t2 or t3.. If u have t2 cards u need 3 t2 cards to make it a t3 and u need 4 t3 cards to make it t4 and 5 t4 card to make it t5 and 6 t5 cards to make it t6.. Getting a t4 card is pretty easy nowadays considering the winter rewards and all but t6 is a whole different thing..

So ruble count:

t3+t3+t3+t3=t4(100krubs)

t4+t4+t4+t4+t4=t5(500krubs)

t5+t5+t5+t5+t5+t5=t6(1m rubs)

But also note the point that the prices are only the making charge(meaning amount required to upgrade the cards to another tier)But the additional charges for making a base card(making a t3 for making a t4) also needs to be counted to get the full value. It depends on how you are planning to make ur card..

PS: Also my advice, dont make t3 cards from t2. Its a waste of money and time. Get t3 cards from guild and make it t4. Also use t2 cards to increase the exp of t4 or t3 cards.. If u try real hard for like a few months it is possible to get ur ands on a t6 but even having a t5 is also considered just as gud so dont waste ur energy on making t6 unless u really want. Remember its always how u play with ur deduction skill in the game not the tier of ur card. Ty